mock-1 | Free Mock Test 2026 | 150 MCQs

Question 1

Which of the following is the correct SI base unit for thermodynamic temperature?

Accepted Answer

B) Kelvin

Question 2

Dimensional analysis of the equation $ v^2 = u^2 + 2as $ shows it is dimensionally correct. Which physical quantity does the term '2as' represent?

Accepted Answer

C) Square of velocity

Question 3

A student measures the length of a rod as 25.0 cm using a scale with least count 0.1 cm. The percentage error in the measurement is approximately:

Accepted Answer

B) 0.4%

Question 4

The significance of accuracy in measurement primarily refers to:

Accepted Answer

B) Closeness to true value

Question 5

Which of the following pairs does NOT have the same dimensions?

Accepted Answer

C) Surface tension and force

Question 6

The number of significant figures in 0.004020 is: / 0.004020

Accepted Answer

B) 4

Question 7

If the unit of force is 100 N, unit of length is 10 m and unit of time is 100 s, the unit of mass in this system will be:

Accepted Answer

C) 1000 kg

Question 8

A light ray travels from air to glass. Which quantity remains unchanged?

Accepted Answer

C) Frequency

Question 9

For total internal reflection to occur, light must travel from:

Accepted Answer

B) Denser to rarer

Question 10

In Young's double slit experiment, fringe width increases if:

Accepted Answer

D) Wavelength increases

Question 11

Polarisation of light confirms that light waves are:

Accepted Answer

B) Transverse

Question 12

A convex lens of focal length 20 cm is used to obtain an image twice the size of the object. The object distance is: / 20 cm

Accepted Answer

B) 30 cm

Question 13

The EM waves used in radar systems are:

Accepted Answer

B) Microwaves

Question 14

The laws of reflection are valid for:

Accepted Answer

C) Both plane and curved surfaces

Question 15

Heat transfer by electromagnetic waves without medium is called:

Accepted Answer

C) Radiation

Question 16

Water has maximum density at:

Accepted Answer

B) 4°C (4°C)

Question 17

The amount of heat required to raise temperature of 1 kg of a substance by 1 K is: / 1 kg

Accepted Answer

B) Specific heat

Question 18

Which temperature scale has the same degree interval as Celsius but zero at absolute zero?

Accepted Answer

B) Kelvin

Question 19

The latent heat of fusion of ice is 80 cal/g. This heat is used to:

Accepted Answer

B) Break intermolecular bonds

Question 20

A calorimeter of water equivalent 10 g contains 100 g water at 30°C. Steam at 100°C is passed until temperature reaches 80°C. The mass of steam condensed is (Lv = 540 cal/g): / 10 g

Accepted Answer

C) 12.2 g

Question 21

The calorific value of a fuel is defined as:

Accepted Answer

A) Heat produced per unit mass

Question 22

The velocity of sound is maximum in:

Accepted Answer

C) Steel

Question 23

Echo is produced due to:

Accepted Answer

C) Reflection

Question 24

The SONAR technique uses:

Accepted Answer

B) Ultrasonic waves

Question 25

A source of sound moves towards a stationary observer. The pitch heard by the observer will be:

Accepted Answer

B) Higher than actual

Question 26

Which of the following is a vector quantity?

Accepted Answer

C) Force

Question 27

A body moving with uniform velocity has:

Accepted Answer

B) Zero acceleration

Question 28

Friction between two surfaces depends on:

Accepted Answer

B) Nature of surfaces

Question 29

Newton's third law states that forces always occur:

Accepted Answer

B) In pairs on different bodies

Question 30

A ball is projected with velocity 20 m/s at 30° to horizontal. Its range is (g=10 m/s²):

Accepted Answer

A) 20√3 m

Question 31

Work done by a force is maximum when the angle between force and displacement is:

Accepted Answer

A) 0° (0°)

Question 32

Conservation of mechanical energy holds when:

Accepted Answer

A) Only conservative forces act

Question 33

The centre of mass of a uniform rod lies at its:

Accepted Answer

A) Geometric centre

Question 34

Two objects of masses m and 2m are separated by distance r. The gravitational force on m due to 2m is F. The force on 2m due to m is: / m

Accepted Answer

A) F (F)

Question 35

For a body moving in uniform circular motion, the work done by centripetal force in one complete revolution is:

Accepted Answer

C) Zero

Question 36

Kepler's third law states that square of orbital period is proportional to:

Accepted Answer

B) Cube of semi-major axis

Question 37

Hooke's law holds good within:

Accepted Answer

C) Elastic limit

Question 38

Magnetic lines of force outside a bar magnet:

Accepted Answer

B) Start from north to south

Question 39

The strength of a magnetic pole is measured in:

Accepted Answer

B) Ampere-metre

Question 40

The force between two magnetic poles obeys inverse square law with distance. If distance is halved, force becomes:

Accepted Answer

A) Four times

Question 41

Ferromagnetic materials have:

Accepted Answer

C) Large positive susceptibility

Question 42

The SI unit of electric charge is:

Accepted Answer

B) Coulomb

Question 43

Two point charges q and -q are placed at distance r. The force between them is F. If both charges are doubled and distance is halved, new force is:

Accepted Answer

D) 64F (64F)

Question 44

In a series circuit with two resistors R1=2Ω and R2=4Ω connected to 12V battery, the current through R1 is:

Accepted Answer

A) 2 A

Question 45

A cell of emf 2 V and internal resistance 0.1 Ω is connected to external resistance 3.9 Ω. The terminal voltage is: / 2 V

Accepted Answer

A) 1.95 V

Question 46

Which of the following is a primary cell?

Accepted Answer

C) Dry cell

Question 47

According to Ohm's law, if resistance is constant, current is:

Accepted Answer

A) Directly proportional to voltage

Question 48

An electric heater rated 1000 W operates at 200 V. Its resistance is: / 200 V

Accepted Answer

B) 40 Ω

Question 49

In Kirchhoff's first law (junction rule), the algebraic sum of currents at a node is:

Accepted Answer

C) Zero

Question 50

Joule's law states that heat produced H = I²Rt. For a given resistance and time, heat is proportional to:

Accepted Answer

B) I² (I²)

Question 51

Ampere's circuital law relates:

Accepted Answer

B) Magnetic field and current

Question 52

Fleming's left hand rule gives direction of:

Accepted Answer

B) Force on a current-carrying conductor in magnetic field

Question 53

The magnitude of induced emf in a coil is given by Faraday's law as:

Accepted Answer

B) -dΦ/dt (-dΦ/dt)

Question 54

In an AC generator, the slip rings are used to: / AC

Accepted Answer

B) Transfer AC current to external circuit (AC

Question 55

A transformer operates on the principle of:

Accepted Answer

B) Mutual induction

Question 56

Cathode rays are streams of:

Accepted Answer

C) Electrons

Question 57

In Rutherford's alpha scattering experiment, most alpha particles:

Accepted Answer

B) Passed straight through

Question 58

In Bohr's model, angular momentum of electron in nth orbit is:

Accepted Answer

A) nh/2π (nh/2π)

Question 59

Which radiation has the highest ionizing power?

Accepted Answer

A) Alpha

Question 60

Mass defect is the difference between:

Accepted Answer

B) Mass of nucleus and sum of masses of nucleons

Question 61

Radioactive decay follows first order kinetics. The half-life period is:

Accepted Answer

C) Constant for a given isotope

Question 62

Isotopes are atoms of same element with different:

Accepted Answer

C) Number of neutrons

Question 63

In nuclear fission, the nucleus splits into:

Accepted Answer

A) Two lighter nuclei

Question 64

Atomic bomb is based on:

Accepted Answer

B) Nuclear fission