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

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Question number: 381

» Communication System » Bandwidth of Signals

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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.

It measures the load applied.

Question number: 382

» Electrostatics » Capacitors

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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?

Circuit Diagram - Two identical parallel plate capacitors

Circuit Diagram - Two Identical Parallel Plate Capacitors

Choices

Choice (4)Response

a.

3: 5

b.

3: 1

c.

5: 3

d.

5: 1

Question number: 383

» Laws of Motion » Momentum

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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

» Laws of Motion » Impulse

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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

Graph explaining force vs time graph

Graph Explaining Force vs Time Graph

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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