NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 211 - 213 of 2320

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Question number: 211

» Physics and Measurement » Dimensional Analysis and Its Applications

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MCQ▾

Question

In an experiment the angles are required to be measured using an instrument, 29 divisions of the main scale exactly coincide with the 30 divisions of the vernier scale. If the smallest division of the main scale is half- a degree (= 0.5°), then the least count of the instrument is:

Choices

Choice (4)Response

a.

one degree

b.

one minute

c.

half degree

d.

half minute

Question number: 212

» Electrostatics » Capacitors

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MCQ▾

Question

A parallel plate air condenser is connected with a battery. Its charge, potential difference, electric field and energy are Q 0, V 0, E 0, and U 0, respectively. In order to fill the complete space between the plates a dielectric slab is inserted, the battery is still connected. Now the corresponding values Q, V, E and U are in relation with the initially stated as

(1) V > V 0

(2) Q > Q 0

(3) E > E 0

(4) U > U 0

Select the correct answers and mark it according to the following codes:

Choices

Choice (4)Response

a.

1 and 3 are correct

b.

1 and 2 are correct

c.

2 and 4 are correct

d.

1,2 and 3 are correct

Question number: 213

» Electrostatics » Capacitors

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Assertion-Reason▾

Question

Assertion (Ꭺ)

Circuit containing capacitors should be handled cautiously even when there is no current.

Reason (Ꭱ)

The capacitors are very delicate and so quickly breakdown.

Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

b.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

c.

Ꭺ is true but Ꭱ is false

d.

Both Ꭺ and Ꭱ are false

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