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AIIMS Physics Mock Test - 5

60 Questions MCQ Test AIIMS Mock Tests & Previous Year Papers | AIIMS Physics Mock Test - 5

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This mock test of AIIMS Physics Mock Test - 5 for NEET helps you for every NEET entrance exam. This contains 60 Multiple Choice Questions for NEET AIIMS Physics Mock Test - 5 (mcq) to study with solutions a complete question bank. The solved questions answers in this AIIMS Physics Mock Test - 5 quiz give you a good mix of easy questions and tough questions. NEET students definitely take this AIIMS Physics Mock Test - 5 exercise for a better result in the exam. You can find other AIIMS Physics Mock Test - 5 extra questions, long questions & short questions for NEET on EduRev as well by searching above.
QUESTION: 1

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QUESTION: 2

Solution:
QUESTION: 3

The space between the plates of a parallel plate capacitor is filled consecutively with two dielectric layers of thickness d1 and d2 having relative permittivities ε1 and ε2 respectively. If A is area of each plate, the capacity of the capacitor is

Solution:

As it is series combination of two capacitors,

QUESTION: 4

The rest mass of a photon is

Solution:
QUESTION: 5

A sphere of mass m moving with a constant velocity u hits another stationary sphere of the same mass. If e is the coefficient of restitution, then the ratio of the velocity of two spheres after collision will be

Solution:
QUESTION: 6

A wire of resistance 10Ω is elongated by 10%. The resistance of the elongated wire is

Solution:

the volume of the wire

Thus the elongated resistance is 1.21 times the resistance of original wire i.e 12.1

QUESTION: 7

When light of wavelength 300 nm (nanometer) falls on a photoelectric emitter, photoelectrons are liberated. For another emitter, however light of 600 nm wavelength is sufficient for creating photoemission. What is the ratio of the work functions of the two emitters

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QUESTION: 8

A metal plate gets heated, when cathode rays strike against, it due to

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QUESTION: 9

Which light when falling on a metal will emit photo electrons

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QUESTION: 10

The coil of a dynamo is rotating in a magnetic field. The developed induced e.m.f. changes and the number of magnetic lines of force also changes. The phenomenon can be correctly described as

Solution:
QUESTION: 11

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

Solution:

= 10-3 V = 1mV
As current is increasing, induced e.m.f. is in opposite direction, therefore, e = - 1 mV.

QUESTION: 12

Determine the potential difference Va − Vb between the points a and b of the system of capacitors shown in figure. Given that the capacitance ratio and emf of the cell is E = 95 V

Solution:
QUESTION: 13

Dimensions of 1/μ₀ ∈₀, where symbols have their usual meanings, are

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QUESTION: 14

A light bulb and a parallel plate capacitor (including a dielectric material between the plates) are connected in series to the 60-Hz ac voltage at a wall outlet. When the dielectric material is removed from the space between the plates, does the brightness of the bulb,

Solution:
QUESTION: 15

In an L-R circuit, the value of L is (0.4/π) henry and the value of R is 30 ohm. If in the circuit, an alternating emf of 200 volt at 50 cycles per second is connected, the impedance of the circuit and current will be

Solution:

henry, R = 30 ohm
e = 200 volt, f = 50
I = ?, Z = ?
Impedance of L-R circuit

QUESTION: 16

Inside a hollow charged spherical conductor, the potential at every point

Solution:
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

Two bodies of mass m₁ and m₂ have equal kinetic energies. If p₁ and p₂ are their respective momentum, then ratio p₁ : p₂ is equal to

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QUESTION: 19

A black body has a wavelength of λ at temperature 2000 K. Its corresponding wavelength at temperature 3000 K will be

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QUESTION: 20

Two bulbs of 500 W and 200 W are manufactured to operate on 220 V line. The ratio of heat produced in 500 W and 200 W, in two cases, when firstly they are connected in parallel and secondary in series will be

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QUESTION: 21

The magnetic induction and the intensity of magnetic field inside an iron core of an electromagnet are 1 wb m-2 and 150 Am-1 respectively. The relative permeability of iron is (μ0 = 4π x 10−7 Henry ∕ m)

Solution:

We know that B = μH = μ0μrH
Where μ0 = permeability of free space or air
μr = relative permeability

QUESTION: 22

At the magnetic north pole of the earth, the value of the horizontal component of earth's magnetic field and angle of dip are respectively

Solution:
QUESTION: 23

The Young's modulus of a wire of length (L) and radius (r) is Y N-m⁻2. If the length is reduced to L/2 and radius to r/2, then Young's modulus for the wire will be

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QUESTION: 24

The motion of a rocket is based on the principle of conservation of

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QUESTION: 25

The basis for carbon-14 dating method is that the

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QUESTION: 26

The time period of a simple pendulum is 2 seconds. If length is increased by 4 times, then its period becomes

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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): If velocity-time graph is a straight line parallel to time axis, then acceleration of body is zero.
Reason(R): Acceleration is equal to rate of change of velocity (constant).

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): When net force is perpendicular to direction of velocity, it just changes its direction and not magnitude.
Reason (R): This results in uniform circular motion.

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): A uniform sphere is placed on a smooth horizontal surface and a horizontal force F is applied on it at a distance h above the surface. The acceleration of centre is independent of h.
Reason(R): Acceleration depends only on force and mass.

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):γ-rays are not deflected by electronic and magnetic fields.
Reason(R):γ-rays have no change.

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):An astronaut accidentally gets separated out of his small spaceship accelerating in intersteller space at a constant rate of 90ms⁻2. The acceleration of the astronaut at the instant he is outside the spaceship is more than 90ms⁻2.
Reason(R):More forces act on the astronaut the moment he is out of spaceship.

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): Moving charge particle traces a helical path in a uniform magnetic field provided axis of the helix is perpendicular to magnetic field.
Reason(R): If a moving charges particle enters perpendicularly into a region of magnetic field from outside, it does not complete circular path.

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): Dimensions of Planck's constant are energy x time.
Reason(R): Energy = charge on electron x potential difference.

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 bird is sitting on the floor of a wire cage and the cage is in the hand of a boy. Even when the bird starts flying in the cage, the boy does not experience any change in the weight of the cage.
Reason(R):Bird is still in the cage because of which the boy does not experience any change.

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 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: 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): Surface area of a drop of liquid reduces to reduce energy.
Reason(R): Molecules on the surface of a drop have more energy than the molecules in the interior.

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): Heavy stable nuclides tend to have more number of neutrons than protons.
Reason(R) : In heavy nuclei, there is an excess of neutrons due to Coulomb repulsion between protons.

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): Friction helps motion of body.
Reason(R): Friction is electromagnetic in motion.

Solution:
QUESTION: 39

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:
In a Meter Bride experiment, null point for an unknown resistance is measured. Now, the unknown resistance is put inside an enclosure maintained at a higher temperature. The null point can be obtained at the same point as before by decreasing the value of the standard resistance.
Statement-2:
Resistance of a metal increases with increase in temperature.

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): Ionisation energy of atomic hydrogen is greater than atomic deuterium.
Reason(R): Ionisation energy is directly proportional to reduced mass.

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(A1): Frictional forces are conservative.
Reason(R): Potential energy can be associated with frictional forces.

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): We can distinguish a friend's voice, while listening music.
Reason(R) : Principle of superposition is a linear one.

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): Energy level of an atom with an vacancy in K-shell is below the L,M and N-shells that is lowest.
Reason(R): Electrons in K-shell are most tightly bound.

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): As the radius of earth reduces by 50% without any change in mass, length of a day reduces.
Reason(R): Angular momentum conservation provides drop in time as l decreases to 25% of the original.

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): 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: 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

Max. height of a bullet when fired at 30º with the horizontal is 11 m. Then height when it is fired at 60º is

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QUESTION: 49

Which of the following forms a perfect image free from all aberrations?

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QUESTION: 50

Which of the following is correct concerning rainbow ?

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QUESTION: 51

To obtain a p-type germanium semiconductor, it must be doped with

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QUESTION: 52

In Ramsden's eye-piece, the distance from the eye lens at which the image due to objective of focal length f is formed is

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QUESTION: 53

Which is not a unit of electric field

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QUESTION: 54

Semiconductor is damaged by the strong current due to

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QUESTION: 55

Three electric bulbs of rating 60 W each are joined in series and then connected to electric mains. The power consumed by these three bulbs will be

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QUESTION: 56

Identify the pair which has different dimensions

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QUESTION: 57

The penetration of light into the region of geometrical shadow is called

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QUESTION: 58

A wave front travels

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QUESTION: 59

The superposition principle applies to

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QUESTION: 60

It is easier to draw up a wooden block along a inclined plane than to haul it vertically, principally because

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