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 is used to check the correctness of an equation by comparing the dimensions of:

Accepted Answer

C) Dimensions of each term

Question 3

The error that remains even after repeating the measurement many times and is due to imperfect calibration of the instrument is called:

Accepted Answer

C) Systematic error

Question 4

The dimensions of Planck’s constant (h) are same as that of:

Accepted Answer

B) Angular momentum

Question 5

In an experiment, measured value of a quantity is 2.5 m while the true value is 2.3 m. The percentage error is about:

Accepted Answer

A) 8.7% (8.7%)

Question 6

Which of the following pairs of physical quantities have the same dimensions?

Accepted Answer

B) Work and Torque

Question 7

The law of reflection states that the angle of incidence is equal to the angle of reflection, with both measured from:

Accepted Answer

B) The normal to the surface

Question 8

Total internal reflection occurs when light travels from a medium of higher refractive index to one of lower refractive index, and the angle of incidence is:

Accepted Answer

C) Greater than critical angle

Question 9

Which phenomenon explains the colorful soap bubble?

Accepted Answer

B) Interference

Question 10

In a Young’s double-slit experiment, the central fringe is always:

Accepted Answer

B) Bright

Question 11

Polarization of light establishes that light waves are:

Accepted Answer

B) Transverse

Question 12

A concave mirror with focal length 15 cm forms an image at 30 cm from the mirror. The magnification is: / 15 cm

Accepted Answer

B) -2

Question 13

A concave mirror with focal length 15 cm forms an image at a distance of 45 cm from the mirror. The magnification is: / 15 cm

Accepted Answer

B) -2

Question 14

The electromagnetic spectrum in order of increasing wavelength is:

Accepted Answer

A) Gamma rays, X-rays, UV, Visible, IR, Microwaves, Radio

Question 15

Heat transfer by direct molecular contact in solids is called:

Accepted Answer

C) Conduction

Question 16

Coefficient of linear expansion α, superficial expansion β, and cubical expansion γ for an isotropic solid are related as:

Accepted Answer

D) γ = 3α and β = 2α (γ = 3α

Question 17

Which temperature scale has 180 divisions between the freezing and boiling point of water?

Accepted Answer

B) Fahrenheit

Question 18

A calorimeter contains 100 g of water at 20°C. 50 g of water at 80°C is added. Neglecting heat loss, final temperature is:

Accepted Answer

A) 40°C

Question 19

The specific latent heat of fusion of ice is 336 J/g. Heat required to melt 20 g ice at 0°C to water at 0°C is:

Accepted Answer

A) 6720 J

Question 20

Water has maximum density at:

Accepted Answer

B) 4°C

Question 21

The calorific value of a fuel is defined as the heat produced by complete combustion of:

Accepted Answer

A) 1 kg of fuel (1 kg

Question 22

Sound waves cannot propagate through:

Accepted Answer

D) Vacuum

Question 23

The velocity of sound is maximum in:

Accepted Answer

C) Iron

Question 24

The loudness of sound depends upon its:

Accepted Answer

C) Amplitude

Question 25

Echo is produced due to:

Accepted Answer

B) Reflection of sound

Question 26

The SONAR uses: / SONAR

Accepted Answer

C) Ultrasonic waves

Question 27

A train moving towards a stationary observer blows a whistle. The observed frequency is higher than the actual due to:

Accepted Answer

B) Doppler effect

Question 28

A scalar quantity is:

Accepted Answer

C) Work

Question 29

The friction between two surfaces depends on:

Accepted Answer

C) Nature of surfaces

Question 30

Newton's third law states that for every action, there is an equal and opposite reaction. These forces act on:

Accepted Answer

B) Different bodies

Question 31

A body of mass 2 kg moving with velocity 4 m/s has momentum: / 2 kg

Accepted Answer

C) 8 kg m/s

Question 32

A car accelerates uniformly from rest to 20 m/s in 10 s. The distance covered is:

Accepted Answer

A) 100 m

Question 33

A projectile is launched at 45° with initial speed 20√2 m/s. Its range is (g=10 m/s²): / 45°

Accepted Answer

A) 40 m

Question 34

Work-energy theorem states that work done by net force equals change in:

Accepted Answer

B) Kinetic energy

Question 35

Energy can neither be created nor destroyed; it can only be transformed. This is:

Accepted Answer

B) Law of conservation of energy

Question 36

Centre of mass of a uniform semicircular ring lies:

Accepted Answer

B) On the axis of symmetry at a distance 2R/π from centre

Question 37

The value of acceleration due to gravity ‘g’ on Earth’s surface is maximum at:

Accepted Answer

B) Poles

Question 38

A satellite is in circular orbit. The centripetal force is provided by:

Accepted Answer

B) Gravitational attraction of Earth

Question 39

Kepler’s second law (law of equal areas) implies that a planet moves:

Accepted Answer

B) Faster when closer to the Sun

Question 40

According to Hooke’s law, stress is directly proportional to strain within:

Accepted Answer

B) Elastic limit

Question 41

The magnetic field lines inside a long solenoid are:

Accepted Answer

B) Parallel straight lines

Question 42

Magnetic lines of force form closed loops because:

Accepted Answer

B) Magnetic monopoles do not exist

Question 43

Pole strength of a bar magnet is 40 A-m. If its length is 10 cm, its magnetic dipole moment is:

Accepted Answer

A) 4 A-m²

Question 44

The inverse square law of magnetism states that the force between two isolated magnetic poles is:

Accepted Answer

B) Inversely proportional to square of distance

Question 45

Diamagnetic materials have relative permeability:

Accepted Answer

C) Slightly less than 1 (1

Question 46

Two point charges +2 µC and -2 µC are separated by 10 cm. The electrostatic force between them is (k = 9×10⁹ N m²/C²): / +2 µC

Accepted Answer

A) 3.6 N (attractive) (3.6 N

Question 47

Which of the following is a good conductor of electricity?

Accepted Answer

C) Graphite

Question 48

Three resistors 2 Ω, 3 Ω, 6 Ω are connected in parallel. The equivalent resistance is: / 2 Ω, 3 Ω, 6 Ω

Accepted Answer

A) 1 Ω (1 Ω)

Question 49

The EMF of a cell is measured in:

Accepted Answer

B) Volt

Question 50

A primary cell differs from a secondary cell in that:

Accepted Answer

B) It cannot be recharged

Question 51

According to Ohm’s law, the current through a conductor is directly proportional to:

Accepted Answer

C) Voltage across it

Question 52

An electric heater of 1000 W operates for 2 hours. Energy consumed is: / 1000 W

Accepted Answer

A) 2 kWh (2 kWh)

Question 53

Kirchhoff’s current law is based on conservation of:

Accepted Answer

B) Charge

Question 54

Joule’s law for heating effect: H = I²Rt. If current is doubled and resistance halved, heat produced in same time becomes:

Accepted Answer

A) Twice

Question 55

Ampere’s circuital law relates the line integral of magnetic field to:

Accepted Answer

C) Current enclosed by the loop

Question 56

Fleming’s left hand rule gives direction of:

Accepted Answer

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

Question 57

Electromagnetic induction was discovered by:

Accepted Answer

C) Faraday

Question 58

Lenz’s law is a consequence of conservation of:

Accepted Answer

C) Energy

Question 59

In a step-up transformer:

Accepted Answer

C) N_s > N_p (N_s > N_p)

Question 60

An AC generator works on the principle of: / AC

Accepted Answer

B) Electromagnetic induction

Question 61

Cathode rays are streams of:

Accepted Answer

C) Electrons

Question 62

X-rays are produced when fast-moving electrons are suddenly stopped by a metal target. The minimum wavelength of X-rays depends on: / X

Accepted Answer

B) Applied voltage

Question 63

In Rutherford’s α-scattering experiment, most α-particles passed through gold foil undeflected. This indicated:

Accepted Answer

A) Atom is mostly empty space

Question 64

According to Bohr’s model, the angular momentum of electron in a stable orbit is quantized as:

Accepted Answer

B) mvr = nh/2π (mvr = nh/2π)