# NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 381 - 384 of 2320

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## Question number: 381

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MCQ▾

### Question

What is the function of a screw gauge in the experiment of determining Young’s modulus of a wire?

### Choices

Choice (4)Response

a.

It measures the diameter of the wire.

b.

It measures the extension in the wire.

c.

It measures the length of the wire.

d.

## Question number: 382

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MCQ▾

### Question

Figure given below shows two identical parallel plate capacitors connected to a battery with switch S closed. The switch is now opened and the free space between the plates of capacitors is filled with a dielectric of dielectric constant 3. What will be the ratio of total electrostatic energy stored in both capacitors before and after the introduction of the dielectric?

### Choices

Choice (4)Response

a.

3: 5

b.

3: 1

c.

5: 3

d.

5: 1

## Question number: 383

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MCQ▾

### Question

A boat of mass 1000 kg is moving with a velocity of 5 m/s. A person of mass 60 kg jumps into the boat. The velocity of the boat with the person will be –

### Choices

Choice (4)Response

a.

4.71 cm/s

b.

47.1 m/s

c.

4.71 m/s

d.

47.1 cm/s

## Question number: 384

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MCQ▾

### Question

The magnitude of the force (in newton) acting on a body varies with time t (in microsecond) as shown in fig. AB, BC, and CD are straight line segments. The magnitude of the total impulse of the force on the body from t = 4 us to t = 16 us is

### Choices

Choice (4)Response

a.

5 10 -4 N. s

b.

5 10 -2 N. s

c.

5 10 -5 N. s

d.

5 10 -3 N. s

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