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# AIIMS Physics Mock Test - 7

## 60 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Physics Mock Test - 7

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This mock test of AIIMS Physics Mock Test - 7 for NEET helps you for every NEET entrance exam. This contains 60 Multiple Choice Questions for NEET AIIMS Physics Mock Test - 7 (mcq) to study with solutions a complete question bank. The solved questions answers in this AIIMS Physics Mock Test - 7 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this AIIMS Physics Mock Test - 7 exercise for a better result in the exam. You can find other AIIMS Physics Mock Test - 7 extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

Solution:
QUESTION: 2

Solution:
QUESTION: 3

### An air capacitor of capacity C = 10μ F is connected to a constant voltage battery of 12 volt. Now the space between the plates is filled with a liquid of dielectric constant 5. The charge that flows now from battery to the capacitor is

Solution:

C = 10 μ F
Charge in capacitor q = CV
= 10 x 12
= 120 μ C
On keeping liquid of dielectric constant5, capacity will becomes of 5 time.
∴ Charge q = 5 x 120
= 600 μ C

QUESTION: 4

An oxide coated filament is useful in vacuum tubes because essentially

Solution:
QUESTION: 5

When wavelength of incident photon is decreased upon

Solution:
QUESTION: 6

Which of the following law is used in the Millikan's method for the determination of charge?

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QUESTION: 7

Quantum theory of light gives concept of

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QUESTION: 8

An electrical cable having a resistance of 0.2 Ω delivers 10 kW at 200 V.D.C. to a factory. What is the efficiency of transmission?

Solution:
QUESTION: 9

A bomb of 12 kg explodes into two pieces of masses 4 kg and 8 kg. The velocity of 8 kg mass is 6 m/sec. The kinetic energy of the other mass is

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QUESTION: 10

A generator at a utility company produces 100 A of current at 4000 V. The voltage is stepped up to 240000 V by a transformer before it is sent on a high voltage transmission line. The current in transmission line is

Solution:
QUESTION: 11

A rectangular, a square, a circular and an elliptical loop, all in the (x - y) plane, are moving out of a uniform magnetic field with a constant velocity, The magnetic field is directed along the negative z axis direction. The induced emf, during the passage of these loops, out of the field region, will not remain constant for:

Solution:
QUESTION: 12

Which quantity is increased in step-down transformer ?

Solution:
QUESTION: 13

The pressure exerted by an electromegnetic wave of intensity I on a non-reflecting surface is (where c = Velocity of light)

Solution:
QUESTION: 14

What is the value of inductance L for which the current is a maximum in series LCR circuit with C = 10 μF and ω = 1000s−1 ?

Solution:
QUESTION: 15

An electric dipole is kept in a uniform electric field. It experiences

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QUESTION: 16

Two capacitors of capacity 4μF and 6μF are connected in series and a battery is connected to the combination the energy stored is E1. If they are connected in parallel and if the same battery is connected to this combination the energy stored is E2. The ratio of E1 and E2 is

Solution:

As the capacitors are connected in series As the capacitors are connected in parallel QUESTION: 17

The same retarding force is applied to stop a train. The train stops after 80 m. If the speed is doubled, then the distance will be

Solution:
QUESTION: 18

A light and a heavy body have equal kinetic energy. Which one has a greater momentum ?

Solution:
QUESTION: 19

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

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QUESTION: 20

A 4μ F conductor is charged to 400 volts and then its plates are joined through a resistance of 1 k Ω. The heat produced in the resistance is

Solution:

The energy stored in the capacitor = 1/2cv2

i.e. -  This energy will be converted into heat in the resistor

QUESTION: 21

A certain amount of current when flowing in a properly set tangent galvanometer, produces a deflection of 45º. If the current be reduced by a factor of √3, the deflection would

Solution:
QUESTION: 22

A steel wire of length 'L' has a magnetic moment 'M'. The wire is bent into a semi circular arc its magnetic moment will be

Solution:
QUESTION: 23

If rope of lift breaks suddenly, the tension exerted by the surface of lift (a=acceleration of lift)

Solution:
QUESTION: 24

The work done in stretching a wire by 1 mm is 4 J. The work done in stretching another wire of the same material, but with double the radius and half the length by 2 mm is

Solution:  QUESTION: 25

Beta particles are

Solution:
QUESTION: 26

The P.E. of a simple harmonic oscillator, when the particle is half way to its end point 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): A parallel plate capacitor is connected across battery through a key. A dielectric slab of constant K is introduced between the plates. The energy stored becomes K times.
Reason(R): The surface density of charge on the plates remains constant or unchanged.

Solution:
QUESTION: 28

In the following question, a Statement-1 is given followed by a corresponding Statement-2 just below it. Read the statements carefully and mark the correct answer-
Statement-1:
Two cylinders, one hollow (metal) and the other solid (wood) with the same mass and identical dimensions are simultaneously allowed to roll without slipping down an inclined plane from the same height. The hollow cylinder will reach the bottom of the inclined plane first.
Statement-2:
By the principle of conservation of energy, the total kinetic energies of both the cylinders are identical when they reach the bottom of the incline.

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): Infrared radiations are used to preserve food stuffs.
Reason(R): Infrared radiations are produced by ionised gases.

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):Nuclei having number about 60 are most stable.
Reason(R):When two or more light nuclei are combined into a heavier nucleus, then the binding energy per nucleon will increase.

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): Radio waves are not electomagnetic waves.
Reason(R): Basic source of electromagnetic wave is an accelerated charge .

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):Mass of nuclear is less than the sum of the masses nucleons present in it.
Reason(R):When the nuclers to form a nucleus, some energy is liberated.

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): The linear distance travelled by the particle in the direction of magnetic field in one complete circle is called the pitch of the parth .
Reason(R): Pitch = ν sin θ x Periodic time

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): A beam of electrons passes undeflected through a region of Reason(R): In the region, both are present and perpendicular to each other and the particle is moving perpendicular to both of them.

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): In cold cathode emission , work function of metal is provided by a strong electric field.

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): When a Wheatstone bridge is balanced then on interchanging the positions of the galvanometer and the cell there is no deflection in the galvanometer .
Reason(R): In balance condition the ratio of the resistances of any two adjacent arms across of the bridge is equal to the ratio of the resistance of the remaining two adjacent arms.

Solution:
QUESTION: 37

In the following question, a Statement-1 is given followed by a corresponding Statement-2 just below it. Read the statements carefully and mark the correct answer-
Statement-1:
It is easier to pull a heavy object than to push it on a level ground.
Statement-2:
The magnitude of frictional force depends on the nature of the two surfaces in contact.

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): Faraday's laws are consequences of conservation of energy.
Reason(R): In a purely resistive AC circuit, the current lags behind the emf in phase.

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): Holes in the wall of the sound board of a sonometer help in increasing the intensity of sound produced.
Reason(R): Air inside the sound board remains in communication with the air outside throught the holses.

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): γ-rays provide information about structure of atomic nuclei.
Reason (R): γ-rays are not deflected in electric or magnetic fields.

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): 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: 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):The parabolic curves obtained in Thomson's mass spectrograph show that ions of higher value of specific charge lie on the outer parabola.
Reason(R): Ions of different veocities arrive at different points on the parabola.

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):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: 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 surface charge densities of two spherical conductors of radii r1 and r2 are equal. Then electric field intensities near their surfaces are also equal.
Reason(R): Surface charge density Solution:
QUESTION: 45

In the following question, a Statement-1 is given followed by a corresponding Statement-2 just below it. Read the statements carefully and mark the correct answer-
Statement-1:
For an observer looking out through the window of a fast moving train, the nearby objects appear to move in the opposite direction to the train, while the distant objects appear to be stationary.
Statement-2:
If the observer and the object are moving at velocities respectively with reference to a laboratory frame, the velocity of the object with respect to the observer is 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): The specific heat capacity at constant volume and at constant pressure are having different values because the system does different works against the surroundings in constant volume and constant pressure processes.
Reason(R) : From Ist law of thermodynamics, Q = dU + W where symbols have their usual meanings.

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 body is projected at such an angle that the horizontal range is three times the greatest height. The angle of projection is

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QUESTION: 49

In a laboratory four convex lenses L1 , L2 , L3 and L4 of focal lengths 2, 4, 6 and 8cm, respectively are available. Two of these lenses form a telescope of length 10cm and magnifying power 4. The objective and eye lenses are respectively

Solution:
QUESTION: 50

A person uses spectacle of power + 2 D. He is suffering from

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QUESTION: 51

The splitting of white into several colours on passing through a glass prism is due to

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QUESTION: 52

At 0 K temperature, a p-type semiconductor

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QUESTION: 53

In p-type semiconductor the majority and minority charge carriers are respectively

Solution:
QUESTION: 54

The approximate value of heat produced in 5 min. by a bulb of 210 watt is (J=4.2 joule/calorie)

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QUESTION: 55

The unit of force is a

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QUESTION: 56

Length cannot be measured by

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QUESTION: 57

A wavefront is an imaginary surface where

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QUESTION: 58

Two sources of same intensity interfere at a point and produced resultant I. When one source is removed, the intensity at that point will be

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QUESTION: 59

The wave theory of light was given by

Solution:
QUESTION: 60

Yoe lift a heavy book from the floor of the room and keep it in the book-shelf having a height 2m. In this process you take 5 seconds. The work done by you will depend upon

Solution: