Chapter 3

Physics

+2 college entrance (after SEE) past exam questions

Past questions and answers

73 questions set from this chapter, 20 of them more than once; 9 are most repeated (set, or a close variant set, in 3 or more exams). Most repeated first.

Most repeated · 4 of 18 exams
Asked 4 times
2083 · Science Model Set C · 1 mark
2083 · Science Model Set D · 1 mark
2083 · Science Model Set E · 1 mark
2080 · Science Model · 1 mark

Swimming is possible on account of (a) law of gravitation (b) first law of motion (c) second law of motion (d) third law of motion

Answer

(d) third law of motion

The swimmer pushes the water backward (action) and the water pushes the swimmer forward (reaction), equal and opposite.

Answer checked by Claude Sonnet · Oct 21, 2026

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Most repeated · 4 of 18 exams
Asked 4 times
2083 · Science Model Set A (first release) · 1 mark
2083 · Science Model Set B (first release) · 1 mark
2083 · Science Model Set C (first release) · 1 mark
2083 · Science Model Set E (first release) · 1 mark

Which color of light has minimum frequency? (a) red (b) blue (c) green (d) yellow

Answer

(a) red

Among visible colours red has the longest wavelength, and since $c=f\lambda$ , it has the lowest frequency (violet has the highest).

Answer checked by Claude Sonnet · Oct 21, 2026

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Most repeated · 4 of 18 exams
Asked 4 times
2083 · Science Model Set A (first release) · 1 mark
2083 · Science Model Set B (first release) · 1 mark
2083 · Science Model Set C (first release) · 1 mark
2083 · Science Model Set E (first release) · 1 mark

Kwh (Kilo watt hour) is a unit of (a) power (b) energy (c) current (d) voltage

Answer

(b) energy

$1\ \text{kWh}=1000\ \text{W}\times3600\ \text{s}=3.6\times10^6\ \text{J}$ . It is power multiplied by time, which is energy.

Answer checked by Claude Sonnet · Oct 21, 2026

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Most repeated · 3 of 18 exams
Asked 3 times
2083 · Science Model Set A · 1 mark
2083 · Science Model Set D · 1 mark
2080 · Science Model · 1 mark

Which of the following is not a unit of energy? (a) kWh (b) Nm (c) $\mathrm{kg\,m\,s^{-1}}$ (d) Joule

Answer

(c) $\mathrm{kg\,m\,s^{-1}}$

This is the unit of momentum. Energy units are kWh, joule and N m (which equals joule).

Answer checked by Claude Sonnet · Oct 21, 2026

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Most repeated · 3 of 18 exams
Asked 3 times
2083 · Science Model Set D · 1 mark
2083 · Science Model Set E · 1 mark
2080 · Science Model · 1 mark

Which one of the following is a form of energy? (a) pressure (b) momentum (c) light (d) power

Answer

(c) light

Light is a form of energy. Pressure, momentum and power are not forms of energy (power is the rate of doing work).

Answer checked by Claude Sonnet · Oct 21, 2026

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Most repeated · 3 of 18 exams
Asked 2 times
2083 · Science Model Set D · 1 mark
2080 · Science Model · 1 mark

Which of the following is not unit of length? (a) radius (b) angstrom (c) light year (d) micron

Similar questions: Which of following is not unit of length (2083 · Science Model Set C)

Answer

(a) radius

Radius is a length itself, a quantity, not a unit. Angstrom ( $10^{-10}$ m), light year and micron ( $10^{-6}$ m) are all units of length.

Answer checked by Claude Sonnet · Oct 21, 2026

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Most repeated · 3 of 18 exams
Asked 2 times
2083 · Science Model Set D · 1 mark
2080 · Science Model · 1 mark

Which of the following is the unit of electric charge (a) Volt (b) Newton (c) Coulomb (d) Ampere

Similar questions: Which of the following is the unit of electric (2083 · Science Model Set A)

Answer

(c) Coulomb

The SI unit of electric charge is the coulomb (C); volt is potential difference, newton is force and ampere is current.

Answer checked by Claude Sonnet · Oct 21, 2026

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Most repeated · 3 of 18 exams
2083 · Science Model Set A · 1 mark

Which of the following is the unit of electric charge (a) Coulomb (b) Newton (c) Volt (d) Ampere

Similar questions: Which of the following is the unit of electric (2083 · Science Model Set D)

Answer

(a) Coulomb

The SI unit of electric charge is the coulomb (C). Newton is the unit of force, volt of potential difference and ampere of current.

Answer checked by Claude Sonnet · Oct 21, 2026

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Most repeated · 3 of 18 exams
2083 · Science Model Set C · 1 mark

Which of following is not unit of length (a) radian (b) angstrom (c) light year (d) micron

Similar questions: Which of the following is not unit of length (2083 · Science Model Set D)

Answer

(a) radian

The radian is a unit of plane angle, not length. The angstrom ( $10^{-10}$ m), light year ( $9.46\times10^{15}$ m) and micron ( $10^{-6}$ m) are all units of length.

Answer checked by Claude Sonnet · Oct 21, 2026

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Asked 2 times
2083 · Science Model Set A · 1 mark
2083 · Science Model Set E · 1 mark

A convex lens can give virtual image of a real object when an object is (a) at the focus (b) at infinity (c) beyond focus (d) between pole and focus

Answer

(d) between pole and focus

When the object is placed between the optical centre and the focus ( $u<f$ ), the rays diverge after refraction. The image is virtual, erect and magnified.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set A · 1 mark
2083 · Science Model Set B · 1 mark

If a ball is released from a bus, the ball will appear to hit the ground following a…………….path. (a) circular (b) parabolic (c) straight (d) hyperbolic

Answer

(c) straight

For an observer in the bus, the ball has the same horizontal velocity as the bus, so it appears to fall vertically in a straight line. To an observer on the ground the path is parabolic.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set A · 1 mark
2083 · Science Model Set B · 1 mark

Rocket works on a principal conservation of (a) mass (b) energy (c) angular momentum (d) linear momentum

Answer

(d) linear momentum

The rocket expels exhaust gas backwards. By conservation of linear momentum, the rocket gains an equal forward momentum.

Answer checked by Claude Sonnet · Oct 21, 2026

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Asked 2 times
2083 · Science Model Set B · 1 mark
2083 · Science Model Set C · 1 mark

A semiconductor has generally ……………… valance electrons (a) 2 (b) 3 (c) 6 (d) 4

Answer

(d) 4

Semiconductors such as silicon and germanium are in group IV, with four valence electrons.

Answer checked by Claude Sonnet · Oct 21, 2026

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Asked 2 times
2083 · Science Model Set D · 1 mark
2080 · Science Model · 1 mark

A spring balance carrying a mass of 20 kg in a lift registered 200 N. During free fall of the lift, the balance records (a) 2000 N (b) 20 N (c) 200 N (d) zero

Answer

(d) zero

In free fall the lift accelerates downwards with $a=g$ , so the apparent weight is

$R = m(g-a) = 20(g-g)=0$

and the balance reads zero (weightlessness).

Answer checked by Claude Sonnet · Oct 21, 2026

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Asked 2 times
2083 · Science Model Set D · 1 mark
2080 · Science Model · 1 mark

What is the boiling point of mercury? (a) $-39^\circ$ C (b) $100^\circ$ C (c) $212^\circ$ C (d) $357^\circ$ C

Answer

(d) $357^\circ$ C

Mercury boils at $357^\circ$ C. Its melting point is $-39^\circ$ C, which is why it is liquid at room temperature.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set D · 1 mark
2080 · Science Model · 1 mark

The frequency of direct current is (a) 0 Hz (b) 100 Hz (c) 1000 Hz (d) 10000 Hz

Answer

(a) 0 Hz

Direct current flows in one direction with constant polarity and does not alternate, so its frequency is zero.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set D · 1 mark
2080 · Science Model · 1 mark

1 pascal is equal to (a) 1 Dyne/cm $^2$ (b) 1 Newton/m $^2$ (c) 1 Newton/m (d) 1 Joule/m

Answer

(b) 1 Newton/m $^2$

Pressure is force per unit area, so the SI unit pascal is $1\ \mathrm{Pa} = 1\ \mathrm{N/m^2}$ .

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set D · 1 mark
2080 · Science Model · 1 mark

The change in Celsius scale corresponding to the change in Fahrenheit scale of $20^\circ$ F is (a) $\frac{50^\circ}{9}$ C (b) $100^\circ$ C (c) $\frac{100^\circ}{9}$ C (d) $\frac{200^\circ}{9}$ C

Answer

(c) $\frac{100^\circ}{9}$ C

The size of one degree satisfies $\Delta C/5 = \Delta F/9$ , so

$\Delta C = \frac{5}{9}\times 20 = \frac{100}{9}\,^\circ\mathrm{C}$

Answer checked by Claude Sonnet · Oct 21, 2026

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Asked 2 times
2083 · Science Model Set D · 1 mark
2080 · Science Model · 1 mark

A concave lens give an image which is (a) real and erect (b) real and inverted (c) virtual and erect (d) virtual and inverted

Answer

(c) virtual and erect

A concave lens always forms a virtual, erect and diminished image between the lens and its focus (for a real object).

Answer checked by Claude Sonnet · Oct 21, 2026

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Asked 2 times
2083 · Science Model Set D · 1 mark
2080 · Science Model · 1 mark

A person suffering from hypermetropia requires which type of spectable lenses? (a) concave (b) convex (c) concave-concave (d) cylindrical

Answer

(b) convex

In hypermetropia (far-sightedness) the image forms behind the retina; a convex lens converges the light earlier and corrects it.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set D · 1 mark
2080 · Science Model · 1 mark

Audible range of frequency is (a) 20Hz to 20KHz (b) 200Hz to 2000Hz (c) 20Hz to 10KHz (d) 2000Hz to 20KHz

Answer

(a) 20Hz to 20KHz

The normal human ear hears sounds from about 20 Hz to 20,000 Hz; below this is infrasound and above it is ultrasound.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set B (first release) · 1 mark
2083 · Science Model Set E (first release) · 1 mark

If temperature of conductor is increased, resistance of conductor (a) increases (b) decreases (c) remains constant (d) becomes zero

Answer

(a) increases

In a metallic conductor, a rise in temperature increases the vibrations of the lattice ions, so electrons collide more often and the resistance increases ( $R=R_0(1+\alpha t)$ ).

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set A · 1 mark

When water is heated from $0^\circ$ C to $10^\circ$ C, its density (a) increases (b) decreases (c) remains the same (d) first increases and then decreases

Similar questions: When water is heated from 0^°C to 10^°C, its (2083 · Science Model Set B)

Answer

(d) first increases and then decreases

Water has maximum density at $4^\circ$ C. From $0^\circ$ C to $4^\circ$ C its density rises, and above $4^\circ$ C it falls.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set B · 1 mark

When water is heated from $0^\circ$ C to $10^\circ$ C, its volume (a) increases (b) decreases (c) remains the same (d) first decreases then increases

Similar questions: When water is heated from 0^°C to 10^°C, its (2083 · Science Model Set A)

Answer

(d) first decreases then increases

Water contracts when heated from $0^\circ$ C to $4^\circ$ C, so its volume decreases and its density is maximum at $4^\circ$ C. Above $4^\circ$ C it expands normally, so the volume increases up to $10^\circ$ C. This is the anomalous expansion of water.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set A · 1 mark

High temperature is measured by (a) mercury thermometer (b) gas thermometer (c) pyrometer (d) sphygmonometer

Answer

(c) pyrometer

A pyrometer measures very high temperatures without contact, using radiation from the hot body. Mercury and gas thermometers cannot be used at such temperatures.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set A · 1 mark

In an optical fiber, the transmission of light from one end to other is the result of (a) interference (b) diffraction (c) refraction (d) repeated total internal reflection

Answer

(d) repeated total internal reflection

Light entering the core strikes the core-cladding boundary at an angle greater than the critical angle. It is totally reflected again and again along the fibre.

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2083 · Science Model Set A · 1 mark

The minimum value of charge on any charged body may be (a) $1.6 \times 10^{-19}$ C (b) 1 C (c) $1\ \mu$ C (d) $4.8 \times 10^{-12}$ C

Answer

(a) $1.6 \times 10^{-19}$ C

Charge is quantised, $q = ne$ . The smallest possible charge is that of one electron or proton, $e = 1.6\times10^{-19}$ C.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set A · 1 mark

The action and reaction of third law of motion (a) must act upon same body (b) need not be equal in magnitude but must have same line of action (c) must act upon different bodies (d) must be equal in magnitude but need not have same line of action

Answer

(c) must act upon different bodies

Action and reaction are equal and opposite, but they act on two different bodies. That is why they do not cancel.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set A · 1 mark

A body at rest may have (a) energy (b) momentum (c) speed (d) velocity

Answer

(a) energy

A body at rest has zero speed, velocity and momentum. It can still have potential energy because of its position or state.

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2083 · Science Model Set A · 1 mark

Which of the following state passes greater P.E. (a) solid (b) liquid (c) gas (d) none

Answer

(c) gas

The molecules of a gas are far apart and the intermolecular forces are weakest. They therefore have the greatest potential energy, and solids have the least.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set A · 1 mark

The dimensional formula for force is (a) $[MLT^{-2}]$ (b) $[MLT^{-1}]$ (c) $[ML^{-1}T^{1}]$ (d) $[ML^{2}T^{2}]$

Answer

(a) $[MLT^{-2}]$

$F = ma = [M]\,[LT^{-2}] = [MLT^{-2}]$

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2083 · Science Model Set B · 1 mark

The full form of UV rays is. (a) Ultraviolet (b) Ultra-violent (c) Ultra valve (d) Ultimate violet

Answer

(a) Ultraviolet

UV rays are electromagnetic radiation with wavelength shorter than visible violet light, roughly 10 nm to 400 nm.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set B · 1 mark

A cooking pot should have (a) high specific heat and low conductivity (b) high specific heat and high conductivity (c) low specific heat and low conductivity (d) low specific heat and high conductivity

Answer

(d) low specific heat and high conductivity

Low specific heat means the pot heats up quickly with little heat. High thermal conductivity passes the heat to the food rapidly and evenly.

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2083 · Science Model Set B · 1 mark

Which of the following is derived unit? (a) mass (b) velocity (c) length (d) time

Answer

(b) velocity

Mass, length and time are fundamental quantities. Velocity is derived, with unit $\mathrm{m\,s^{-1}}$ (length divided by time).

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set B · 1 mark

If electric field is uniform, then the electric lines of force are (a) divergent (b) convergent (c) circular (d) parallel

Answer

(d) parallel

A uniform field has the same magnitude and direction at every point. Its lines of force are therefore parallel and equally spaced straight lines.

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2083 · Science Model Set B · 1 mark

SI unit of temperature is (a) Kelvin (b) Degree Celsius (c) Degree Fahrenheit (d) Degree Reaumur

Answer

(a) Kelvin

The kelvin (K) is the SI base unit of temperature. Celsius, Fahrenheit and Reaumur are other scales, not SI base units.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set B · 1 mark

The temperature of a gas is a measure of (a) average kinetic energy of the gas (b) average potential energy of the gas (c) distance between its molecules (d) size of the molecules

Answer

(a) average kinetic energy of the gas

By the kinetic theory, the average translational kinetic energy per molecule is $\tfrac{3}{2}kT$ , so temperature is proportional to the average kinetic energy of the molecules.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set B · 1 mark

Temperature of $27^\circ$ C into Kelvin scale is (a) 300 kelvin (b) 295 kelvin (c) 298 kelvin (d) 30 kelvin

Answer

(a) 300 kelvin

$T(\text{K}) = t(^\circ\text{C}) + 273 = 27 + 273 = 300$ K.

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2083 · Science Model Set B · 1 mark

A convex mirror gives an image, which is (a) real and inverted (b) virtual and erect (c) real and magnified (d) virtual and magnified

Answer

(b) virtual and erect

A convex mirror always forms an image behind the mirror that is virtual, erect and diminished, whatever the position of the object.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set B · 1 mark

The image of distant object formed by a long – sighted person is (a) at the retina (b) behind the retina (c) in front of the retina (d) no image is formed

Answer

(b) behind the retina

In long-sightedness (hypermetropia) the eyeball is too short or the lens too weak, so rays from a distant object would converge behind the retina. A convex lens corrects this.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set B · 1 mark

Two magnetic field lines: (a) Intersect at the neutral point (b) Never intersect each other (c) Intersect near the north -pole or south pole (d) Intersect at the midpoint of the magnet

Answer

(b) Never intersect each other

At any point the field has one definite direction, so two field lines cannot cross. If they did, the compass needle would have two directions at that point.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set C · 1 mark

Which of the following statement is true? (a) g is same at all places on the surface of earth (b) g has its maximum value at the equator (c) g is less at earth’s surface than at height above it or a depth below it (d) g is greater at the poles than at the equator

Answer

(d) g is greater at the poles than at the equator

The Earth is slightly flattened, so the polar radius is smaller than the equatorial radius. Since $g = GM/R^2$ , $g$ is larger at the poles. Also, $g$ decreases both above the surface and below it, so it is not the same everywhere.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set C · 1 mark

Which of the laws of Newton about motion is most general (a) first (b) second (c) third (d) first and third

Answer

(b) second

The second law, $F = ma$ , is the most general: the first law follows from it when $F=0$ , and the third law can be derived from it together with conservation of momentum.

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2083 · Science Model Set C · 1 mark

The sure test of electrification is (a) attraction (b) repulsion (c) attraction and repulsion both (d) neither attraction nor repulsion

Answer

(b) repulsion

A charged body can attract an uncharged body (by induction) and a magnet can attract iron, so attraction does not prove electrification. Repulsion occurs only between like charges, so it is the sure test.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set C · 1 mark

If the density of the universe is equal to the critical density, the universe can be thought to be: (a) Saddle-like (b) Flat (c) Spherical (d) Oval

Answer

(b) Flat

If the density equals the critical density, the curvature of space is zero ( $\Omega = 1$ ) and the universe is flat. Greater density gives a closed (spherical) universe, and lower density gives an open (saddle-like) one.

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2083 · Science Model Set C · 1 mark

The weight of a body at the center of the earth is (a) infinite (b) zero (c) slightly less than that at the equator (d) slightly more than that at the equator

Answer

(b) zero

At the centre of the Earth, $g = 0$ since the pull of the surrounding mass cancels out from all directions, so weight $W = mg = 0$ .

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2083 · Science Model Set C · 1 mark

In steady state, the temperature of the body (a) increases with time (b) decreases with time (c) doesn’t change and remains same all over the body (d) doesn’t change but may be different at the different parts of the body

Answer

(d) doesn't change but may be different at the different parts of the body

In steady state, the temperature at each point stays constant with time while heat keeps flowing, so a temperature gradient persists along the body.

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2083 · Science Model Set C · 1 mark

The specific heat of substance depends on a substance (a) heat supplied (b) mass (c) material of substance (d) temperature difference

Answer

(c) material of substance

Specific heat $c = \dfrac{Q}{m\,\Delta T}$ is a characteristic property of the material and does not depend on the heat supplied, mass or temperature difference.

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2083 · Science Model Set C · 1 mark

The twinkling of distant stars is because (a) stars are non-luminous body (b) stars do not emit light continuously (c) of fluctuation of refractive index of earth atmosphere (d) of dispersion of light by water droplets in atmosphere

Answer

(c) of fluctuation of refractive index of earth atmosphere

Starlight passes through atmospheric layers of changing density, so it is refracted along a continually varying path, which makes the apparent brightness flicker.

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2083 · Science Model Set C · 1 mark

A frictionless machine has an efficiency of (a) 100 % (b) < 100 % (c) 200 % (d) 75 %

Answer

(a) 100 %

Efficiency is $\dfrac{\text{output work}}{\text{input work}}\times100\%$ . With no friction there is no energy loss, so output equals input and efficiency is 100 %.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set C · 1 mark

In myopia image is formed (a) at the retina (b) behind the retina (c) in front of retina (d) no image is formed

Answer

(c) in front of retina

In myopia (short-sightedness) the eyeball is too long or the lens too converging, so the image of a distant object forms in front of the retina. It is corrected with a concave lens.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set E · 1 mark

The dimension of the gravitational constant $G$ is (a) $[M^{-1}L^{3}T^{-2}]$ (b) $[M^{-1}L^{3}T^{-1}]$ (c) $[M^{-1}L^{-1}T^{-2}]$ (d) $[M^{-2}L^{2}T^{-2}]$

Answer

(a) $[M^{-1}L^{3}T^{-2}]$

From $F=\frac{Gm_1m_2}{r^2}$ , $G=\frac{Fr^2}{m_1m_2}$ . With $[F]=MLT^{-2}$ :

$[G]=\frac{MLT^{-2}\cdot L^2}{M^2}=M^{-1}L^{3}T^{-2}.$

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set E · 1 mark

A substance having more specific heat (a) gets heated slowly and store long time (b) gets heated quickly and store long time (c) gets heated quickly and store short time (d) gets heated slowly and store short time

Answer

(a) gets heated slowly and store long time

A large specific heat means more heat is needed for a given temperature rise, so it heats slowly, and it also cools slowly, retaining heat for a long time.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set E · 1 mark

Which thermometer is used to measure an object having temperature $500^\circ$ C? (a) Clinical (b) Lab (c) Alcohol (d) Pyrometer

Answer

(d) Pyrometer

Clinical, lab and alcohol thermometers cannot measure such high temperatures. A pyrometer measures very high temperatures without contact.

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set E · 1 mark

A projectile of mass $m$ is fired with velocity $u$ at an angle $\phi$ with the horizontal. The relation between K.E. and P.E. at the maximum height is (a) K.E. > P.E. (b) K.E. < P.E. (c) K.E. = P.E. (d) depends on both

Answer

(d) depends on both

At maximum height only the horizontal velocity $u\cos\phi$ remains, so

$K.E.=\tfrac12 mu^2\cos^2\phi,\qquad P.E.=\tfrac12 mu^2\sin^2\phi.$

Which is larger depends on $\phi$ (equal only at $45^\circ$ ).

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set E · 1 mark

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 Joule, the angle that the force makes with the direction of motion is (a) $0^\circ$ (b) $45^\circ$ (c) $30^\circ$ (d) $60^\circ$

Answer

(d) $60^\circ$

$W=Fd\cos\theta\Rightarrow 25=5\times10\cos\theta\Rightarrow\cos\theta=\tfrac12\Rightarrow\theta=60^\circ.$

Answer checked by Claude Sonnet · Oct 21, 2026

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2083 · Science Model Set E · 1 mark

A person cannot see objects clearly beyond 50 cm. The power of the lens to correct the vision is (a) $+5$ D (b) $-0.5$ D (c) $-2$ D (d) $+2$ D

Answer

(c) $-2$ D

The person is short-sighted with far point 50 cm, so a concave lens must form images of distant objects at 50 cm: $f=-0.5$ m.

$P=\frac1f=\frac{1}{-0.5}=-2\ \text{D}.$

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2083 · Science Model Set E · 1 mark

Three dry cells, each of emf 1.5 V, are connected in parallel. Their equivalent emf will be (a) 1.5 V (b) 0.5 V (c) 4.5 V (d) 2 V

Answer

(a) 1.5 V

Cells joined in parallel give the same emf as a single cell, because the terminals are common; only the current capacity and the effective internal resistance change. So the equivalent emf is $1.5\ \text{V}$ .

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2083 · Science Model Set E · 1 mark

Fleming’s left hand rule gives the direction of (a) current (b) field (c) force (d) thumb

Answer

(c) force

With the forefinger along the field and the middle finger along the current, the thumb gives the direction of the force (motion) on a current-carrying conductor in a magnetic field.

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2083 · Science Model Set E · 1 mark

The frequency of Kantipur F.M. is 96.1 MHz. Its wavelength is (a) 2.1 m (b) 3.1 m (c) 4.1 m (d) 5.1 m

Answer

(b) 3.1 m

$\lambda=\frac{c}{f}=\frac{3\times10^{8}}{96.1\times10^{6}}\approx 3.12\ \text{m}\approx 3.1\ \text{m}$

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2079 · Science Model · 1 mark

1 kg water is equal to s? (a) 1 litre (b) 1000cc (c) 1000cm3 (d) all

Answer

(d) all

The density of water is $1\ \mathrm{g/cm^3}$ , so $1\ \mathrm{kg}=1000\ \mathrm{g}$ occupies $1000\ \mathrm{cm^3}$ . Since $1\ \mathrm{cc}=1\ \mathrm{cm^3}$ and $1\ \mathrm{L}=1000\ \mathrm{cm^3}$ , all the options are equal.

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2079 · Science Model · 1 mark

The dimensional formula of Newton is (a) [ $\mathrm{M_{0}L_{1}T}$ -2] (b) [ $\mathrm{M_{1}L_{0}T}$ -2] (c) [ $\mathrm{M_{1}L_{1}T}$ -2] (d) [ $\mathrm{M_{1}L_{1}T_{0}}$ ]

Answer

(c) $[\mathrm{M_1L_1T^{-2}}]$

Newton is the unit of force: $F=ma$ , so $[F]=[M][LT^{-2}]=[MLT^{-2}]$ .

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2079 · Science Model · 1 mark

1cc is equal to (a) 1ml (b) 10-3m3 (c) 103 (d) all of the above

Answer

(a) 1ml

One cubic centimetre is a cube of side 1 cm, and by definition $1\,\text{cc} = 1\,\text{cm}^3 = 1\,\text{ml}$ . In SI units this is $10^{-6}\,\text{m}^3$ , not $10^{-3}\,\text{m}^3$ , so only (a) is correct.

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2079 · Science Model · 1 mark

The distance between earth and sun is (a) 1AU (b) 1Ly (c) 1Pc (d) 1A0

Answer

(a) 1AU

The mean Earth-Sun distance is defined as one astronomical unit, $1\,\text{AU} \approx 1.5\times10^{11}$ m. A light year and a parsec are far larger, and an angstrom is atomic in size.

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2079 · Science Model · 1 mark

Which of the following is not the unit of energy? (a) kwhr (b) Nm (c) kgms-1 (d) Joule

Answer

(c) kgms-1

$\text{kg m s}^{-1}$ is the unit of momentum. Kilowatt-hour, $\text{N m}$ and joule are all units of energy.

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2079 · Science Model · 1 mark

Which of the following quantity is scalar quantity? (a) work (b) time (c) current (d) all of the above

Answer

(d) all of the above

Work, time and electric current have magnitude only and no direction in the vector sense, so all three are scalars.

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2079 · Science Model · 1 mark

An iron ball is heated. The percentage increase will be largest in (a) diameter (b) surface area (c) volume (d) density

Answer

(c) volume

For a small rise in temperature, the percentage increases are about $\alpha\Delta T$ for length (diameter), $2\alpha\Delta T$ for area and $3\alpha\Delta T$ for volume. Density decreases. So volume shows the largest percentage increase.

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2079 · Science Model · 1 mark

The quantity of heat required to change the unit mass of a solid substance to its liquid state, while the temperature remains constant, is known as (a) heat (b) latent heat (c) specific heat (d) latent heat of fusion

Answer

(d) latent heat of fusion

Heat needed to change unit mass of a solid into liquid at constant temperature is the specific latent heat of fusion. "Latent heat" alone is a general term that also covers vaporisation.

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2079 · Science Model · 1 mark

The focal length of a plane mirror is (a) zero (b) infinite (c) finite but negative (d) finite but positive

Answer

(b) infinite

A plane mirror is the limiting case of a spherical mirror with $R\to\infty$ , so $f = R/2\to\infty$ . Parallel rays remain parallel after reflection and never converge.

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2079 · Science Model · 1 mark

A person suffered from defect of eyes uses the spectacles with the lens of power 2D. What type of lens is used? (a) convex lens (b) concave lens (c) plano convex lens (d) plano concave lens

Answer

(a) convex lens

A positive power means a converging lens. Since $P = +2\,\text{D}$ , the focal length is $f = \frac{1}{2} = 0.5$ m, and a convex lens is used (as for hypermetropia).

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2079 · Science Model · 1 mark

The heating element in an electric iron is made of ………….. wire. (a) nichrome (b) iron (c) tungsten (d) constantan

Answer

(a) nichrome

Nichrome has high resistivity and a high melting point, and it does not oxidise easily when red hot, so it is used for heating elements.

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2079 · Science Model · 1 mark

When a current flows through a conductor, it’s temperature (a) increases (b) decreases (c) remains same (d) may increase and decrease

Answer

(a) increases

Current in a conductor produces heat $H = I^2Rt$ (Joule heating), so its temperature rises.

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2079 · Science Model · 1 mark

Einstein's mass-energy equivalence relation is (a) $E = \Delta mc^2$ (b) $E = \frac{\Delta m}{c^2}$ (c) $E = \frac{\Delta p}{c^2}$ (d) $E = \frac{\Delta Q}{c^2}$

Answer

(a) $E = \Delta mc^2$

Mass $\Delta m$ lost or converted is equivalent to energy $E=\Delta m\,c^2$ , where $c$ is the speed of light.

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Questions from Kathmandu Model Secondary School (KMC) Entrance Model Questions, Science Set A (College-published model question set for the Class 11 Science entrance (100 MCQs: English, Science, Mathematics), 2083 BS; practice paper, not a recalled board paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Management and Law Set A (College-published model question set for the Class 11 Management and Law entrance (English, Mathematics, GK), 2083 BS; practice paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Science Set B (College-published model question set for the Class 11 Science entrance (100 MCQs: English, Science, Mathematics), 2083 BS; practice paper, not a recalled board paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Management and Law Set B (College-published model question set for the Class 11 Management and Law entrance (English, Mathematics, GK), 2083 BS; practice paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Science Set C (College-published model question set for the Class 11 Science entrance (100 MCQs: English, Science, Mathematics), 2083 BS; practice paper, not a recalled board paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Management and Law Set C (College-published model question set for the Class 11 Management and Law entrance (English, Mathematics, GK), 2083 BS; practice paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Science Set D (College-published model question set for the Class 11 Science entrance (100 MCQs: English, Science, Mathematics), 2083 BS; practice paper, not a recalled board paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Management and Law Set D (College-published model question set for the Class 11 Management and Law entrance (English, Mathematics, GK), 2083 BS; practice paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Science Set E (College-published model question set for the Class 11 Science entrance (100 MCQs: English, Science, Mathematics), 2083 BS; practice paper, not a recalled board paper), Kathmandu Model Secondary School (KMC) Entrance Model Questions, Management and Law Set E (College-published model question set for the Class 11 Management and Law entrance (English, Mathematics, GK), 2083 BS; practice paper), Kathmandu Model Secondary School (KMC) Model Question 2080, Science (College model paper (Set B) for the Class 11 Science entrance (100 MCQs: Science 40, English 20, Mathematics 40), 2080 BS; also posted as page images on bishalkafle.com.np (2023)), Kathmandu Model Secondary School (KMC) Model Questions 2022 (2079 BS), Science (College model paper for the Class 11 Science entrance (100 MCQs: English 20, Science 40, Mathematics 40), July 2022), Kathmandu Model Secondary School (KMC) Model Questions 2022 (2079 BS), Management (College model paper for the Class 11 Management entrance (English, Mathematics, GK), July 2022), Kathmandu Model Secondary School (KMC) Model Question 2080 Management and Law, Set I (College model paper for the Class 11 Management and Law entrance (English, Mathematics, GK), 2080 BS; same questions as Set B of the later 2083 release) and KMC Entrance Model Questions, Science (first release, May 2026) (Earlier posting of the 2083 science sets; a few physics questions were later replaced). Answers are written for this site; check them against your class notes.

Past questions and answers

1.Swimming is possible on account of (a) law of gravitation (b) first law of motion (c) second law of motion (d) third law of motion

2.Which color of light has minimum frequency? (a) red (b) blue (c) green (d) yellow

3.Kwh (Kilo watt hour) is a unit of (a) power (b) energy (c) current (d) voltage

4.Which of the following is not a unit of energy? (a) kWh (b) Nm (c) kg m s−1\mathrm{kg\,m\,s^{-1}}kgms−1 (d) Joule

5.Which one of the following is a form of energy? (a) pressure (b) momentum (c) light (d) power

6.Which of the following is not unit of length? (a) radius (b) angstrom (c) light year (d) micron

7.Which of the following is the unit of electric charge (a) Volt (b) Newton (c) Coulomb (d) Ampere

8.Which of the following is the unit of electric charge (a) Coulomb (b) Newton (c) Volt (d) Ampere

9.Which of following is not unit of length (a) radian (b) angstrom (c) light year (d) micron

10.A convex lens can give virtual image of a real object when an object is (a) at the focus (b) at infinity (c) beyond focus (d) between pole and focus

11.If a ball is released from a bus, the ball will appear to hit the ground following a…………….path. (a) circular (b) parabolic (c) straight (d) hyperbolic

12.Rocket works on a principal conservation of (a) mass (b) energy (c) angular momentum (d) linear momentum

13.A semiconductor has generally ……………… valance electrons (a) 2 (b) 3 (c) 6 (d) 4

14.A spring balance carrying a mass of 20 kg in a lift registered 200 N. During free fall of the lift, the balance records (a) 2000 N (b) 20 N (c) 200 N (d) zero

15.What is the boiling point of mercury? (a) −39∘-39^\circ−39∘C (b) 100∘100^\circ100∘C (c) 212∘212^\circ212∘C (d) 357∘357^\circ357∘C

16.The frequency of direct current is (a) 0 Hz (b) 100 Hz (c) 1000 Hz (d) 10000 Hz

17.1 pascal is equal to (a) 1 Dyne/cm2^22 (b) 1 Newton/m2^22 (c) 1 Newton/m (d) 1 Joule/m

18.The change in Celsius scale corresponding to the change in Fahrenheit scale of 20∘20^\circ20∘F is (a) 50∘9\frac{50^\circ}{9}950∘​C (b) 100∘100^\circ100∘C (c) 100∘9\frac{100^\circ}{9}9100∘​C (d) 200∘9\frac{200^\circ}{9}9200∘​C

19.A concave lens give an image which is (a) real and erect (b) real and inverted (c) virtual and erect (d) virtual and inverted

20.A person suffering from hypermetropia requires which type of spectable lenses? (a) concave (b) convex (c) concave-concave (d) cylindrical

21.Audible range of frequency is (a) 20Hz to 20KHz (b) 200Hz to 2000Hz (c) 20Hz to 10KHz (d) 2000Hz to 20KHz

22.If temperature of conductor is increased, resistance of conductor (a) increases (b) decreases (c) remains constant (d) becomes zero

23.When water is heated from 0∘0^\circ0∘C to 10∘10^\circ10∘C, its density (a) increases (b) decreases (c) remains the same (d) first increases and then decreases

24.When water is heated from 0∘0^\circ0∘C to 10∘10^\circ10∘C, its volume (a) increases (b) decreases (c) remains the same (d) first decreases then increases

25.High temperature is measured by (a) mercury thermometer (b) gas thermometer (c) pyrometer (d) sphygmonometer

26.In an optical fiber, the transmission of light from one end to other is the result of (a) interference (b) diffraction (c) refraction (d) repeated total internal reflection

27.The minimum value of charge on any charged body may be (a) 1.6×10−191.6 \times 10^{-19}1.6×10−19 C (b) 1 C (c) 1 μ1\ \mu1 μC (d) 4.8×10−124.8 \times 10^{-12}4.8×10−12 C

28.The action and reaction of third law of motion (a) must act upon same body (b) need not be equal in magnitude but must have same line of action (c) must act upon different bodies (d) must be equal in magnitude but need not have same line of action

29.A body at rest may have (a) energy (b) momentum (c) speed (d) velocity

30.Which of the following state passes greater P.E. (a) solid (b) liquid (c) gas (d) none

31.The dimensional formula for force is (a) [MLT−2][MLT^{-2}][MLT−2] (b) [MLT−1][MLT^{-1}][MLT−1] (c) [ML−1T1][ML^{-1}T^{1}][ML−1T1] (d) [ML2T2][ML^{2}T^{2}][ML2T2]

32.The full form of UV rays is. (a) Ultraviolet (b) Ultra-violent (c) Ultra valve (d) Ultimate violet

33.A cooking pot should have (a) high specific heat and low conductivity (b) high specific heat and high conductivity (c) low specific heat and low conductivity (d) low specific heat and high conductivity

34.Which of the following is derived unit? (a) mass (b) velocity (c) length (d) time

35.If electric field is uniform, then the electric lines of force are (a) divergent (b) convergent (c) circular (d) parallel

36.SI unit of temperature is (a) Kelvin (b) Degree Celsius (c) Degree Fahrenheit (d) Degree Reaumur

37.The temperature of a gas is a measure of (a) average kinetic energy of the gas (b) average potential energy of the gas (c) distance between its molecules (d) size of the molecules

38.Temperature of 27∘27^\circ27∘C into Kelvin scale is (a) 300 kelvin (b) 295 kelvin (c) 298 kelvin (d) 30 kelvin

39.A convex mirror gives an image, which is (a) real and inverted (b) virtual and erect (c) real and magnified (d) virtual and magnified

40.The image of distant object formed by a long – sighted person is (a) at the retina (b) behind the retina (c) in front of the retina (d) no image is formed

41.Two magnetic field lines: (a) Intersect at the neutral point (b) Never intersect each other (c) Intersect near the north -pole or south pole (d) Intersect at the midpoint of the magnet

42.Which of the following statement is true? (a) g is same at all places on the surface of earth (b) g has its maximum value at the equator (c) g is less at earth’s surface than at height above it or a depth below it (d) g is greater at the poles than at the equator

43.Which of the laws of Newton about motion is most general (a) first (b) second (c) third (d) first and third

44.The sure test of electrification is (a) attraction (b) repulsion (c) attraction and repulsion both (d) neither attraction nor repulsion

45.If the density of the universe is equal to the critical density, the universe can be thought to be: (a) Saddle-like (b) Flat (c) Spherical (d) Oval

46.The weight of a body at the center of the earth is (a) infinite (b) zero (c) slightly less than that at the equator (d) slightly more than that at the equator

47.In steady state, the temperature of the body (a) increases with time (b) decreases with time (c) doesn’t change and remains same all over the body (d) doesn’t change but may be different at the different parts of the body

48.The specific heat of substance depends on a substance (a) heat supplied (b) mass (c) material of substance (d) temperature difference

49.The twinkling of distant stars is because (a) stars are non-luminous body (b) stars do not emit light continuously (c) of fluctuation of refractive index of earth atmosphere (d) of dispersion of light by water droplets in atmosphere

50.A frictionless machine has an efficiency of (a) 100 % (b) < 100 % (c) 200 % (d) 75 %

51.In myopia image is formed (a) at the retina (b) behind the retina (c) in front of retina (d) no image is formed

52.The dimension of the gravitational constant GGG is (a) [M−1L3T−2][M^{-1}L^{3}T^{-2}][M−1L3T−2] (b) [M−1L3T−1][M^{-1}L^{3}T^{-1}][M−1L3T−1] (c) [M−1L−1T−2][M^{-1}L^{-1}T^{-2}][M−1L−1T−2] (d) [M−2L2T−2][M^{-2}L^{2}T^{-2}][M−2L2T−2]

53.A substance having more specific heat (a) gets heated slowly and store long time (b) gets heated quickly and store long time (c) gets heated quickly and store short time (d) gets heated slowly and store short time

54.Which thermometer is used to measure an object having temperature 500∘500^\circ500∘C? (a) Clinical (b) Lab (c) Alcohol (d) Pyrometer

55.A projectile of mass mmm is fired with velocity uuu at an angle ϕ\phiϕ with the horizontal. The relation between K.E. and P.E. at the maximum height is (a) K.E. > P.E. (b) K.E. < P.E. (c) K.E. = P.E. (d) depends on both

56.A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 Joule, the angle that the force makes with the direction of motion is (a) 0∘0^\circ0∘ (b) 45∘45^\circ45∘ (c) 30∘30^\circ30∘ (d) 60∘60^\circ60∘

57.A person cannot see objects clearly beyond 50 cm. The power of the lens to correct the vision is (a) +5+5+5 D (b) −0.5-0.5−0.5 D (c) −2-2−2 D (d) +2+2+2 D

58.Three dry cells, each of emf 1.5 V, are connected in parallel. Their equivalent emf will be (a) 1.5 V (b) 0.5 V (c) 4.5 V (d) 2 V

59.Fleming’s left hand rule gives the direction of (a) current (b) field (c) force (d) thumb

60.The frequency of Kantipur F.M. is 96.1 MHz. Its wavelength is (a) 2.1 m (b) 3.1 m (c) 4.1 m (d) 5.1 m

61.1 kg water is equal to s? (a) 1 litre (b) 1000cc (c) 1000cm3 (d) all

62.The dimensional formula of Newton is (a) [M0L1T\mathrm{M_{0}L_{1}T}M0​L1​T-2] (b) [M1L0T\mathrm{M_{1}L_{0}T}M1​L0​T-2] (c) [M1L1T\mathrm{M_{1}L_{1}T}M1​L1​T-2] (d) [M1L1T0\mathrm{M_{1}L_{1}T_{0}}M1​L1​T0​]

63.1cc is equal to (a) 1ml (b) 10-3m3 (c) 103 (d) all of the above

64.The distance between earth and sun is (a) 1AU (b) 1Ly (c) 1Pc (d) 1A0

65.Which of the following is not the unit of energy? (a) kwhr (b) Nm (c) kgms-1 (d) Joule

66.Which of the following quantity is scalar quantity? (a) work (b) time (c) current (d) all of the above

67.An iron ball is heated. The percentage increase will be largest in (a) diameter (b) surface area (c) volume (d) density

68.The quantity of heat required to change the unit mass of a solid substance to its liquid state, while the temperature remains constant, is known as (a) heat (b) latent heat (c) specific heat (d) latent heat of fusion

69.The focal length of a plane mirror is (a) zero (b) infinite (c) finite but negative (d) finite but positive

70.A person suffered from defect of eyes uses the spectacles with the lens of power 2D. What type of lens is used? (a) convex lens (b) concave lens (c) plano convex lens (d) plano concave lens

71.The heating element in an electric iron is made of ………….. wire. (a) nichrome (b) iron (c) tungsten (d) constantan

72.When a current flows through a conductor, it’s temperature (a) increases (b) decreases (c) remains same (d) may increase and decrease

73.Einstein's mass-energy equivalence relation is (a) E=Δmc2E = \Delta mc^2E=Δmc2 (b) E=Δmc2E = \frac{\Delta m}{c^2}E=c2Δm​ (c) E=Δpc2E = \frac{\Delta p}{c^2}E=c2Δp​ (d) E=ΔQc2E = \frac{\Delta Q}{c^2}E=c2ΔQ​

Swimming is possible on account of (a) law of gravitation (b) first law of motion (c) second law of motion (d) third law of motion

Which color of light has minimum frequency? (a) red (b) blue (c) green (d) yellow

Kwh (Kilo watt hour) is a unit of (a) power (b) energy (c) current (d) voltage

Which of the following is not a unit of energy? (a) kWh (b) Nm (c) $\mathrm{kg\,m\,s^{-1}}$ (d) Joule

Which one of the following is a form of energy? (a) pressure (b) momentum (c) light (d) power

Which of the following is not unit of length? (a) radius (b) angstrom (c) light year (d) micron

Which of the following is the unit of electric charge (a) Volt (b) Newton (c) Coulomb (d) Ampere

Which of the following is the unit of electric charge (a) Coulomb (b) Newton (c) Volt (d) Ampere

Which of following is not unit of length (a) radian (b) angstrom (c) light year (d) micron

A convex lens can give virtual image of a real object when an object is (a) at the focus (b) at infinity (c) beyond focus (d) between pole and focus

If a ball is released from a bus, the ball will appear to hit the ground following a…………….path. (a) circular (b) parabolic (c) straight (d) hyperbolic

Rocket works on a principal conservation of (a) mass (b) energy (c) angular momentum (d) linear momentum

A semiconductor has generally ……………… valance electrons (a) 2 (b) 3 (c) 6 (d) 4

A spring balance carrying a mass of 20 kg in a lift registered 200 N. During free fall of the lift, the balance records (a) 2000 N (b) 20 N (c) 200 N (d) zero

What is the boiling point of mercury? (a) $-39^\circ$ C (b) $100^\circ$ C (c) $212^\circ$ C (d) $357^\circ$ C

The frequency of direct current is (a) 0 Hz (b) 100 Hz (c) 1000 Hz (d) 10000 Hz

1 pascal is equal to (a) 1 Dyne/cm $^2$ (b) 1 Newton/m $^2$ (c) 1 Newton/m (d) 1 Joule/m

The change in Celsius scale corresponding to the change in Fahrenheit scale of $20^\circ$ F is (a) $\frac{50^\circ}{9}$ C (b) $100^\circ$ C (c) $\frac{100^\circ}{9}$ C (d) $\frac{200^\circ}{9}$ C

A concave lens give an image which is (a) real and erect (b) real and inverted (c) virtual and erect (d) virtual and inverted

A person suffering from hypermetropia requires which type of spectable lenses? (a) concave (b) convex (c) concave-concave (d) cylindrical

Audible range of frequency is (a) 20Hz to 20KHz (b) 200Hz to 2000Hz (c) 20Hz to 10KHz (d) 2000Hz to 20KHz

If temperature of conductor is increased, resistance of conductor (a) increases (b) decreases (c) remains constant (d) becomes zero

When water is heated from $0^\circ$ C to $10^\circ$ C, its density (a) increases (b) decreases (c) remains the same (d) first increases and then decreases

When water is heated from $0^\circ$ C to $10^\circ$ C, its volume (a) increases (b) decreases (c) remains the same (d) first decreases then increases

High temperature is measured by (a) mercury thermometer (b) gas thermometer (c) pyrometer (d) sphygmonometer

In an optical fiber, the transmission of light from one end to other is the result of (a) interference (b) diffraction (c) refraction (d) repeated total internal reflection

The minimum value of charge on any charged body may be (a) $1.6 \times 10^{-19}$ C (b) 1 C (c) $1\ \mu$ C (d) $4.8 \times 10^{-12}$ C

The action and reaction of third law of motion (a) must act upon same body (b) need not be equal in magnitude but must have same line of action (c) must act upon different bodies (d) must be equal in magnitude but need not have same line of action

A body at rest may have (a) energy (b) momentum (c) speed (d) velocity

Which of the following state passes greater P.E. (a) solid (b) liquid (c) gas (d) none

The dimensional formula for force is (a) $[MLT^{-2}]$ (b) $[MLT^{-1}]$ (c) $[ML^{-1}T^{1}]$ (d) $[ML^{2}T^{2}]$

The full form of UV rays is. (a) Ultraviolet (b) Ultra-violent (c) Ultra valve (d) Ultimate violet

A cooking pot should have (a) high specific heat and low conductivity (b) high specific heat and high conductivity (c) low specific heat and low conductivity (d) low specific heat and high conductivity

Which of the following is derived unit? (a) mass (b) velocity (c) length (d) time

If electric field is uniform, then the electric lines of force are (a) divergent (b) convergent (c) circular (d) parallel

SI unit of temperature is (a) Kelvin (b) Degree Celsius (c) Degree Fahrenheit (d) Degree Reaumur

The temperature of a gas is a measure of (a) average kinetic energy of the gas (b) average potential energy of the gas (c) distance between its molecules (d) size of the molecules

Temperature of $27^\circ$ C into Kelvin scale is (a) 300 kelvin (b) 295 kelvin (c) 298 kelvin (d) 30 kelvin

A convex mirror gives an image, which is (a) real and inverted (b) virtual and erect (c) real and magnified (d) virtual and magnified

The image of distant object formed by a long – sighted person is (a) at the retina (b) behind the retina (c) in front of the retina (d) no image is formed

Two magnetic field lines: (a) Intersect at the neutral point (b) Never intersect each other (c) Intersect near the north -pole or south pole (d) Intersect at the midpoint of the magnet

Which of the following statement is true? (a) g is same at all places on the surface of earth (b) g has its maximum value at the equator (c) g is less at earth’s surface than at height above it or a depth below it (d) g is greater at the poles than at the equator

Which of the laws of Newton about motion is most general (a) first (b) second (c) third (d) first and third

The sure test of electrification is (a) attraction (b) repulsion (c) attraction and repulsion both (d) neither attraction nor repulsion

If the density of the universe is equal to the critical density, the universe can be thought to be: (a) Saddle-like (b) Flat (c) Spherical (d) Oval

The weight of a body at the center of the earth is (a) infinite (b) zero (c) slightly less than that at the equator (d) slightly more than that at the equator

In steady state, the temperature of the body (a) increases with time (b) decreases with time (c) doesn’t change and remains same all over the body (d) doesn’t change but may be different at the different parts of the body

The specific heat of substance depends on a substance (a) heat supplied (b) mass (c) material of substance (d) temperature difference

The twinkling of distant stars is because (a) stars are non-luminous body (b) stars do not emit light continuously (c) of fluctuation of refractive index of earth atmosphere (d) of dispersion of light by water droplets in atmosphere

A frictionless machine has an efficiency of (a) 100 % (b) < 100 % (c) 200 % (d) 75 %

In myopia image is formed (a) at the retina (b) behind the retina (c) in front of retina (d) no image is formed

The dimension of the gravitational constant $G$ is (a) $[M^{-1}L^{3}T^{-2}]$ (b) $[M^{-1}L^{3}T^{-1}]$ (c) $[M^{-1}L^{-1}T^{-2}]$ (d) $[M^{-2}L^{2}T^{-2}]$

A substance having more specific heat (a) gets heated slowly and store long time (b) gets heated quickly and store long time (c) gets heated quickly and store short time (d) gets heated slowly and store short time

Which thermometer is used to measure an object having temperature $500^\circ$ C? (a) Clinical (b) Lab (c) Alcohol (d) Pyrometer

A projectile of mass $m$ is fired with velocity $u$ at an angle $\phi$ with the horizontal. The relation between K.E. and P.E. at the maximum height is (a) K.E. > P.E. (b) K.E. < P.E. (c) K.E. = P.E. (d) depends on both

A body moves a distance of 10 m along a straight line under the action of a force of 5 N. If the work done is 25 Joule, the angle that the force makes with the direction of motion is (a) $0^\circ$ (b) $45^\circ$ (c) $30^\circ$ (d) $60^\circ$

A person cannot see objects clearly beyond 50 cm. The power of the lens to correct the vision is (a) $+5$ D (b) $-0.5$ D (c) $-2$ D (d) $+2$ D

Three dry cells, each of emf 1.5 V, are connected in parallel. Their equivalent emf will be (a) 1.5 V (b) 0.5 V (c) 4.5 V (d) 2 V

Fleming’s left hand rule gives the direction of (a) current (b) field (c) force (d) thumb

The frequency of Kantipur F.M. is 96.1 MHz. Its wavelength is (a) 2.1 m (b) 3.1 m (c) 4.1 m (d) 5.1 m

1 kg water is equal to s? (a) 1 litre (b) 1000cc (c) 1000cm3 (d) all

The dimensional formula of Newton is (a) [ $\mathrm{M_{0}L_{1}T}$ -2] (b) [ $\mathrm{M_{1}L_{0}T}$ -2] (c) [ $\mathrm{M_{1}L_{1}T}$ -2] (d) [ $\mathrm{M_{1}L_{1}T_{0}}$ ]

1cc is equal to (a) 1ml (b) 10-3m3 (c) 103 (d) all of the above

The distance between earth and sun is (a) 1AU (b) 1Ly (c) 1Pc (d) 1A0

Which of the following is not the unit of energy? (a) kwhr (b) Nm (c) kgms-1 (d) Joule

Which of the following quantity is scalar quantity? (a) work (b) time (c) current (d) all of the above

An iron ball is heated. The percentage increase will be largest in (a) diameter (b) surface area (c) volume (d) density

The quantity of heat required to change the unit mass of a solid substance to its liquid state, while the temperature remains constant, is known as (a) heat (b) latent heat (c) specific heat (d) latent heat of fusion

The focal length of a plane mirror is (a) zero (b) infinite (c) finite but negative (d) finite but positive

A person suffered from defect of eyes uses the spectacles with the lens of power 2D. What type of lens is used? (a) convex lens (b) concave lens (c) plano convex lens (d) plano concave lens

The heating element in an electric iron is made of ………….. wire. (a) nichrome (b) iron (c) tungsten (d) constantan

When a current flows through a conductor, it’s temperature (a) increases (b) decreases (c) remains same (d) may increase and decrease

Einstein's mass-energy equivalence relation is (a) $E = \Delta mc^2$ (b) $E = \frac{\Delta m}{c^2}$ (c) $E = \frac{\Delta p}{c^2}$ (d) $E = \frac{\Delta Q}{c^2}$