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30 Questions MCQ Test AFMC Mock Test Series 2025 - Sample AFMC Physics Mock Test

Sample AFMC Physics Mock Test for NEET 2024 is part of AFMC Mock Test Series 2025 preparation. The Sample AFMC Physics Mock Test questions and answers have been prepared according to the NEET exam syllabus.The Sample AFMC Physics Mock Test MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Sample AFMC Physics Mock Test below.
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Sample AFMC Physics Mock Test - Question 1

Mass defect of an atom refers to

Detailed Solution for Sample AFMC Physics Mock Test - Question 1

A mass defect refers to the difference in mass between of an atom and the sum of the masses of the protons, neutrons, and electrons of the atom. The "missing" mass is the energy released by the formation of the atomic nucleus.

Sample AFMC Physics Mock Test - Question 2

Best neutron moderator is

Detailed Solution for Sample AFMC Physics Mock Test - Question 2

Heavy Water is an excellent moderator due to its high moderating ratio and low absorption cross section for neutrons.

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Sample AFMC Physics Mock Test - Question 3

Who indirectly determined the mass of the electron by measuring the charge of the electron ?

Detailed Solution for Sample AFMC Physics Mock Test - Question 3

Millikan determined the mass of the electron by measuring the charge of the electron.

Sample AFMC Physics Mock Test - Question 4

Resistance of a wire at 20°C is 20 Ω and at 500°C is 60 Ω. At what temperature its resistance is 25 Ω ?

Detailed Solution for Sample AFMC Physics Mock Test - Question 4

RT=60 ohms @ T=500oC

Also, RT′​=20 ohms @ T′=20oC

Resistance at a given temperature RT​=RT′​[1+α(T−T′)]

Let resistance of wire is 25 ohm at temperature T′′.

Sample AFMC Physics Mock Test - Question 5

Photo cell is a device to

Detailed Solution for Sample AFMC Physics Mock Test - Question 5

Photo cell is used to convert photon energy(i.e. light energy) into chemical energy.

Sample AFMC Physics Mock Test - Question 6

A nichrome wire 50cm long and square millimeter cross-section carries a current of 4A when connected to a 2V battery. The resistivity of nichrome wire in ohm meter is

Detailed Solution for Sample AFMC Physics Mock Test - Question 6

Sample AFMC Physics Mock Test - Question 7

Two coils are placed close to eachother. The mutual inductance of the pair of coils depends upon

Detailed Solution for Sample AFMC Physics Mock Test - Question 7

The coupled flux of two coils system is used to define the mutual inductance between the coils. The mutual inductance between the coils is 

So it is defined as the proportionality between the emf generated in coil 2 due to the current flows in coil 1. Thus It depends on the relative position and orientation of two coils. 

Sample AFMC Physics Mock Test - Question 8

The p.d. across an instrument in an A.C. circuit of frequency f is V and the current flowing through it is I such that V = 5 cos 2π amp. The power dissipated in the instrument is

Detailed Solution for Sample AFMC Physics Mock Test - Question 8

V = 5cos2πft    [ω = 2πf]

V = 5cosωt

=5sin(ωt+π2)  and i = 2sinωt

Power = Vrms×irms×cosφ=0

(Since φ = π/2, therefore cosφ = cos(π/2)=0)

Sample AFMC Physics Mock Test - Question 9

The current flowing in a coil of self inductance 0.4 mH is increased by 250 mA in 0.1 s. The e.m.f. induced will be

Detailed Solution for Sample AFMC Physics Mock Test - Question 9

As current is increasing, induced e.m.f. is in opposite direction, therefore, e = - 1 mV.

Sample AFMC Physics Mock Test - Question 10

The electrostatic capacitance depends on

Detailed Solution for Sample AFMC Physics Mock Test - Question 10


The capacitance is proportional to the surface area of the conducting plate and inversely proportional to the distance between the plates. Hence, it depends upon the size of the conductor, and not upon the nature of conductor, thickness or colour.

Sample AFMC Physics Mock Test - Question 11

The capacity of a condenser with two identical plates separated by a distance 'd' in air is 'C'. If the distance of separation is reduced to d/2, the capacity is

Detailed Solution for Sample AFMC Physics Mock Test - Question 11

The capacity of a parallel plate condenser is given as,

When the separation between the plates is halved then the new capacity of the condenser is given as,

Thus, the new capacity of parallel plate condenser is 2C.

Sample AFMC Physics Mock Test - Question 12

If size of the earth is reduced to half, then no. of days in one year will be

Detailed Solution for Sample AFMC Physics Mock Test - Question 12

Time period is not dependent on radius.

Sample AFMC Physics Mock Test - Question 13

Figure shows two large cylindrical shells having uniform linear charge densities + λ and - λ . Radius of inner aylinder is 'a' and that of outer cylinder is 'b'. A charged particle of mass m , charge q revolves in a circle of radius r. Then its speed 'V' is:
[Neglect gravity and assume the radii of both cylinders to be very small in comparison to their length]

Detailed Solution for Sample AFMC Physics Mock Test - Question 13

Using Gauss's law for electrostatics,

Electric field at charged particle would be given as,

So centripetal force on particle is, 

Sample AFMC Physics Mock Test - Question 14

The energy emitted per second by a black body at 27°C is 10 J. If the temperature of the black body is increased to 327°C, the energy emitted per second will be

Detailed Solution for Sample AFMC Physics Mock Test - Question 14

Sample AFMC Physics Mock Test - Question 15

Vapour is injected at a uniform rate in a closed vessel which was initially evacuated. The pressure in the vessel

Detailed Solution for Sample AFMC Physics Mock Test - Question 15

When the vapour is injected into the evacuated vessel, the pressure of the vessel starts to increase. As the pressure is increased and reaches the saturated vapour pressure, the vapour starts to condense beyond this. Therefore, after a particular instant, the pressure of the container becomes constant.

So, the pressure increases initially and then becomes constant.

Sample AFMC Physics Mock Test - Question 16

At what temperature, the root mean square velocity of a hydrogen molecules is equal to that of an oxygen molecules at 47°C?

Detailed Solution for Sample AFMC Physics Mock Test - Question 16

Sample AFMC Physics Mock Test - Question 17

The diameter of a copper sphere is 6 cm. It is melted to form a wire of uniform cross-section. If the length of the wire is 36 cm then find the radius of the wire.

Detailed Solution for Sample AFMC Physics Mock Test - Question 17

Sample AFMC Physics Mock Test - Question 18

A ball of mass m strikes elastically a wall at an angle of 30° with velocity ν. The change in momentum is

Detailed Solution for Sample AFMC Physics Mock Test - Question 18

Change in momentum (P)=2mv cosθ

P=2mv cos 30°

 P=2mv√3/2 

P=√3mv

Sample AFMC Physics Mock Test - Question 19

If a long hollow copper pipe carries a current, the produced magnetic field will be

Detailed Solution for Sample AFMC Physics Mock Test - Question 19

If the current flows on the surface of a long hollow copper pipe. Then the magnetic field inside is zero. Hence, there shall be magnetic field produced outside the pipe.

Sample AFMC Physics Mock Test - Question 20

In a surface tension experiment with a capillary tube, water rises upto 8 mm. If the same experiment is repeated on an artificial satellite, which is revoling around the earth, water will tise in capillary tube upto a height of

Detailed Solution for Sample AFMC Physics Mock Test - Question 20
  • Height of capillary rise liquid is given by h = 2T/(rρg) . T is surface tension, r is radius of capillary tube, ρ is density and g is acceleration due to gravity.
  • Since acceleration due to gravity is in denominator and acceleration due to gravity is negligibly small at the orbit where satteleite is revolving around the earth, capillary rise will be very high.
  • So 'full length' may be the correct answer.
Sample AFMC Physics Mock Test - Question 21

Two solid pieces, one of steel and the other of aluminium when immersed completely in water have equal weights. When the solid pieces are weighed in air

Detailed Solution for Sample AFMC Physics Mock Test - Question 21

Apparent weight in air

Sample AFMC Physics Mock Test - Question 22

If pressure inside two soap bubbles are 1.01 and 1.02 atm respectively, then the ratio between their volumes is (Take atmospheric pressure = 1 atm)

Detailed Solution for Sample AFMC Physics Mock Test - Question 22

Pressure × Radius = Surface Tension
Here the pressure is Gauge Pressure, i.e the difference between absolute pressure and atmospheric pressure 
Hence ratio of gauge pressures is 1:2 
Accordingly ratio of radii is 2:1 
Since Volume∝radius3 
Hence ratio of volumes is 8:1

Sample AFMC Physics Mock Test - Question 23

An incompressible fluid flows steadily through a cylindrical pipe which has radius 2 R at point A and radius R at point B. If velocity at point A is ν, then its velocity at point B is

Detailed Solution for Sample AFMC Physics Mock Test - Question 23

ATQ, equation of continuity,

Area is inversely proportional to flow rate, 

therefore if area is reduced by four times 

the flow rate becomes 4 times = 4v

Sample AFMC Physics Mock Test - Question 24

The potential energy of a molecule on the surface of a liquid compared to one inside the liquid is

Detailed Solution for Sample AFMC Physics Mock Test - Question 24
  • When the surface area of  the liquid is increased molecules from the interior of the liquid rise to surface.
  • As these molecules reach the surface work is done against the cohesive force.This work is stored in the molecules in the form of potential energy.
  • Thus, the  potential energy of the molecules lying in the surface is greater than that of the molecules in the interior of the liquid.
Sample AFMC Physics Mock Test - Question 25

Water level rises in a capilary tube, if the angle of contact is

Detailed Solution for Sample AFMC Physics Mock Test - Question 25

If the angle of contact is less than 90 ,then the level of water rises in concave meniscus.

Sample AFMC Physics Mock Test - Question 26

Which of the following affets the elasticity of a substance?

Detailed Solution for Sample AFMC Physics Mock Test - Question 26
  • Elasticity depends on temperature.
  • Also, elasticity changes due to impurities because they increase binding of crystal grains., hence enhancing elasticity.
  • Hammering also changes the structure of material as crystal grains break up into smaller units which plays a large role in determining elasticity (increases elasticity).
  • Also, annealing tends to form a uniform orientation of crystal grains, hence producing larger crystal and changing elasticity.
Sample AFMC Physics Mock Test - Question 27

A wire can be broken by applying a load of 200 N.The force required to break another wire of the same length and same material, but double in diameter, is

Detailed Solution for Sample AFMC Physics Mock Test - Question 27

We know that, E = -dΦ/dt,
E = -d/dt {2t² - 3t + 1}
= -(4t - 3)
at t = 0.25 sec,...
E = -(4×0.25 - 3) = 2 V

Sample AFMC Physics Mock Test - Question 28

A body starts from rest. What is the ratio of the distance travelled by the body during the 4th and 3rd second

Detailed Solution for Sample AFMC Physics Mock Test - Question 28

Sample AFMC Physics Mock Test - Question 29

For a projectile, the ratio of maximum height reached to the square of flight time is (g = 10 ms⁻2)

Detailed Solution for Sample AFMC Physics Mock Test - Question 29

Sample AFMC Physics Mock Test - Question 30

To increase the magnification of a telescope

Detailed Solution for Sample AFMC Physics Mock Test - Question 30

From the above relation we can see that magnification is directly proportional to the focal length of objective lens.

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