# AIIMS Physics Mock Test - 10

## 60 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Physics Mock Test - 10

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Attempt AIIMS Physics Mock Test - 10 | 60 questions in 60 minutes | Mock test for NEET preparation | Free important questions MCQ to study AIIMS Mock Tests & Previous Year Papers for NEET Exam | Download free PDF with solutions
QUESTION: 1

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QUESTION: 2

Solution:
QUESTION: 3

### Three resistances each of 4 Ω are connected in the form of an equilateral triangle. The effective resistance between two corners is

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QUESTION: 4

The weight of a man in a lift moving upward is 608N while the weight of the same man in the lift moving downwards with the same acceleration is 368N. His normal weight in newtons is

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QUESTION: 5

Monochromatic X - rays of wavelength 0 . 124 Å undergo compton scattering through an angle 60 º from a carbon block. The wavelength of the scatterted X - rays in Å , is Solution:
QUESTION: 6

The energy required to charge a parallel plate condenser of plate separation d and plate area of cross-section A such that the uniform electric field between the plates is E, is

Solution:

Energy required = 1 2 CV2 = 1 2 ε0 E2Ad

QUESTION: 7

The work functions for sodium and copper are 2 eV and 4 eV. Which of them is suitable for a photocell with 4000Å light

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QUESTION: 8

When ultraviolet rays are incident on a metal plate, then the photoelectric effect does not occurs. It occurs by the incidence of

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QUESTION: 9

Consider the following statements regarding the properties of X-rays and electrons :(I) Both ionise gases (II) Both are deflected by electric and magnetic fields (III) Both cause fluorescence in some substances (IV) Both affect the photographic plate. Which of the above statements are correct ?

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QUESTION: 10

The ratio of secondary to the primary turns in a transformer is 3 : 2. If the power output be P, then the input power, neglecting all losses, must be equal to

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QUESTION: 11

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

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QUESTION: 12

In an oscillating LC circuit, the maximum charge on the capacitor is Q. The charge on the capacitor, when the energy is stored equally between the electric and magnetic field is

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QUESTION: 13

Which scientist experimentally proved the existance of electromagnetic waves?

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QUESTION: 14

The switch in the circuit to the right is initially open. It is closed at time t = 0. Which of the following statements is false?

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QUESTION: 15

If the distance between the plates of a parallel plate condenser is halved and the dielectric is doubled, then its capacity increases by

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QUESTION: 16

The region between two concentric spheres of radii R1 and R2 includes a volume charge density given by ρ = a r where a is a constant and r is the distance from the centre. There is a charge Q located at the centre. The value of a for which the region R 1 ≤ r ≤ R 2 has a constant electric field intensity is

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QUESTION: 17

A long spring is stretched by 2 cm, its potential energy is U. If the spring is stretched by 10 cm, the potential energy stored in it will be

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QUESTION: 18

A body of mass 2 kg is projected vertically upwards with a velocity of 2 m sec⁻1. The K.E. of the body just before striking the ground is

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QUESTION: 19

A black body, at a temprature of 227ºC, radiates heat at a rate of 20 cal m⁻2s⁻1. When its temperature is raised to 727ºthe heat radiated by it in cal m⁻2s⁻1 will be closest to

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QUESTION: 20

The resistance of two bulbs of the same voltage are in the ratio 1:2. On connecting them in parallel the power consumption will be in the ratio

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QUESTION: 21

The magnetic lines of force inside a bar magnet

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QUESTION: 22

Isogonic lines are those for which

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QUESTION: 23

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

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QUESTION: 24

In the above question, the impulse acting on the object is

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QUESTION: 25

Cobalt = 60 has half life of 5.3 years. The time taken for 7/8 of the original sample to disintegrate will be-

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QUESTION: 26

A simple pendulum of length 'l' has a maximum angular displacement (θ). The energy of a bob of mass m at the end of the displacement is

Solution:
QUESTION: 27

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Thomson's method of determining e m of positive rays, a parabola is obtained on the screen.
Reason(R): Electric field e and magnetic field B are kept parallel to each other.

Solution:
QUESTION: 28

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Pressure of a gas in a discharge tube for the production of cathode rays is of the order of 10-1mm of mercury.
Reason(R): At very low pressure, the number of atoms will be too small.

Solution:
QUESTION: 29

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The centre of mass of an extended object is that point on the object where the resultant of all the external forces acting on the body acts.
Reason(R) : An object under the effect of several external forces moves as if it were a particle placed at its centre of mass and all forces transferred to the point.

Solution:
QUESTION: 30

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The slope of work-time graph gives instantaneous power.
Reason(R): Instantaneous power is dot product of force and displacement.

Solution:
QUESTION: 31

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A system cannot have mutual inductance without having self inductances.
Reason(R): If mutual inductance of a system is zero, its self inductances must be zero.

Solution:
QUESTION: 32

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A):A soda water bottle is falling freely the bubbles of the gas will not rise in water.
Reason(R):Pressure in the water does not increase with depth.

Solution:
QUESTION: 33

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A):Penetrating power of β-particles is more compared to α-particles.
Reason(R):Ionising power of β-particles is more compared to α-particles.

Solution:
QUESTION: 34

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): When wavelength of light is increased, the refractive index of the medium increases.
Reason (R): Refractive index ∝ wavelength of light.

Solution:
QUESTION: 35

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The more the sparking potential , the less the separation between the electrodes of a discharge tube.
Reason(R): Sparking potential Solution:
QUESTION: 36

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The potential of a charged conductor throughout its volume is same.
Reason(R): The line integral of electric field is zero along any path.

Solution:
QUESTION: 37

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The moment of inertia of a given body about an axis through its centre of mass is smaller than the moment of inertia of the body about any other parallel axis.
Reason(R) : All the force acting on the body can be assumed to act at its centre of mass for its translatory motion.

Solution:
QUESTION: 38

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Torque is an axial vector and directed along the axis of rotation.
Reason(R): Torque is equal to vector product of force to the position vector.

Solution:
QUESTION: 39

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A planet move faster, when it is closer to the sun in its orbit and vice-versa.
Reason(R): Orbital velocity in an orbit of planet is constant.

Solution:
QUESTION: 40

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Steel ball bearings are used in ceiling fans in regulating the speed of rotation of the fan.
Reason(R) : Frictional torques act as a dissipative sources for loss of power in rotation

Solution:
QUESTION: 41

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): If one of the prongs of a fork is broken, there will be only a forced vibration.
Reason(R): On breaking of a prong, it will only be a rod and so a particular frequency of vibration will not be available unless an external agency continues to vibrate.

Solution:
QUESTION: 42

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Diatonic scales have eight notes covering double octave.
Reason(R): Mach number is used to express the speed of objects in relation to the speed of sound.

Solution:
QUESTION: 43

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): Intensity of sound wave changes when the listener moves towards or away from the stationary source.
Reason(R) : The motion of listener causes the apparent change in wavelength.

Solution:
QUESTION: 44

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): The ratio of the first three harmonics in a closed pipe bear a ratio 1:3:5.
Reason(R): Frequency is an odd multiple of where l is the length of the pipe.

Solution:
QUESTION: 45

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): In an elastic collision of two billiard balls, the total kinetic energy is conserved during the short time of oscillation of the balls, when they are in contact.
Reason(R): Energy spent against friction does not follow the law of conservation of energy.

Solution:
QUESTION: 46

In the following question, a Statement of Assertion (A) is given followed by a corresponding Reason (R) just below it. Read the Statements carefully and mark the correct answer-
Assertion(A): A graph between the absolute temperature (T) of a gas and the square of speed of sound (v2) will bea parabola.
Reason(R) Solution:
QUESTION: 47

An electric motor exerts a force of 40 N on a cable and pulls it by a distance of 30 m in one minute. The power supplied by the motor is

Solution:
QUESTION: 48

A bomber plane is moving horizontally with a speed of 500 ms-1 and a bomb released from it, strikes the ground in 10 s. The angle at which it strikes the ground is (g = 10 m/s2)

Solution:

Here, νx = 500 m/s; νy = gt = 10 X 10 = 100 m/s
tan θ = νy/ νx = 100/500 = 1/5
or θ = tan−1 1/5

QUESTION: 49

The dark lines in the solar spectrum are due to

Solution:
QUESTION: 50

A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of combination is

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QUESTION: 51

A symmetric double convex lens is cut in two equal parts by a plane perpendicular to the principal axis. If the power of the original lens is 4D, the power of a cut lens will be

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QUESTION: 52

In an intrinsic semiconductor the Fermi level is

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QUESTION: 53

A hole in a p-type semiconductor is

Solution:
QUESTION: 54

The amount of heat produced in a resistor when a current is passed through it can be found using

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QUESTION: 55

The dimensions of Planck's constant and angular momentum are respectively

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QUESTION: 56

Identity the pair whose dimensions are equal

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QUESTION: 57

Who was the first to demonstrate the phenomenon of interference of light?

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QUESTION: 58

According to wave theory, light is a form of energy which travels through a medium in the form of

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QUESTION: 59

Both light and sound waves produce diffraction. It is more difficult to observe the diffraction with light waves because

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QUESTION: 60

A uniform chain of length L and mass M is lying on a smooth table and one third of its length is hanging vertically down over the edge of the table. If g is acceleration due to gravity, the work required to pull the hanging part on to the table is

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