NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 962 - 967 of 2320

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Question number: 962

» Work, Energy and Power » Potential Energy

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MCQ▾

Question

A tennis ball dropped from a height of 6 m rebounds only 2.1 f meter after hitting the ground. What fraction of energy is lost in the impact?

Choices

Choice (4)Response

a.

0.466

b.

1.26

c.

0.65

d.

0.5

Question number: 963

» Laws of Motion » Laws of Friction

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MCQ▾

Question

A block of metal is lying on the floor of a bus. The maximum acceleration which can be given to the bus so that the block may remain at rest, will be –

Choices

Choice (4)Response

a.

μg 2

b.

μ 2 g

c.

μ/g

d.

μg

Passage

Read the passage given below and answer the questions that follow:

A system consists of block A and B each of mass m connected by a light spring as shown in the figure with block B in contact with a wall. The block A compresses the spring by 3mg /k from natural length of spring and then released from rest. Neglect friction anywhere.

Block system with 2 blocks A and B

Block System with 2 Blocks a and B

In above figure we show that block A and B which connected with spring.

Question number: 964 (3 of 3 Based on Passage) Show Passage

» Experimental Skills » Screw Gauge

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MCQ▾

Question

Velocity of center of mass of system comprising A ands when block B just loses contact with the wall

Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

Question number: 965

» Ray Optics » Power of a Lens

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MCQ▾

Question

The plane surface of a Plano-convex lens is silvered If radius of curved surface is R and refractive index is µ, then the system behaves like a concave mirror whose radius will be,

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 966

» Ray Optics » Total Internal Reflection

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MCQ▾

Question

A glass prism is dipped in water as shown in figure. A light ray is incident normally on the surface AB. It reaches the surface BC after T. I. R

Glass prism dipped in water

Glass Prism Dipped in Water

A glass prism is dipped in water. A light ray is incident normally on the surface AB and reaches the surface BC after total internal reflection.

Choices

Choice (4)Response

a.

b.

c.

d.

All of the above

Question number: 967

» Ray Optics » Magnification

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MCQ▾

Question

An object of length 1 cm is placed at a distance of 15 cm from a concave mirror of focal length 10 cm. The nature and size of the image are,

Choices

Choice (4)Response

a.

Virtual, erect, 0.5 cm

b.

Real, inverted, 2.0 cm

c.

Real, inverted, 1.0 cm

d.

Virtual, erect, 1.0 cm

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