NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1652 - 1655 of 2320

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Question number: 1652

» Oscillations and Waves » Simple Pendulum

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MCQ▾

Question

A simple pendulum is executing simple harmonic motion with a time period . If the length of the pendulum is increased by 21%, the percentage increase in the time period of the pendulum of is,

Choices

Choice (4)Response

a.

21%

b.

10%

c.

50%

d.

30%

Question number: 1653

» Electronic Devices » Semiconductors

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Assertion-Reason▾

Question

Assertion (Ꭺ)

We can measure the potential barrier of a PN junction by putting a sensitive voltmeter across its terminals.

Reason (Ꭱ)

The current through the PN junction is not same in forward and reversed bias.

Choices

Choice (4)Response

a.

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

b.

Ꭺ is false but Ꭱ is true

c.

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

d.

Both Ꭺ and Ꭱ are false

Question number: 1654

» Electronic Devices » Semiconductors

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MCQ▾

Question

The forbidden energy band gap in conductors, semiconductors and insulators are EG 1, EG 2 and EG 3 respectively. The relation among them is

Choices

Choice (4)Response

a.

EG 1 > EG 2 > EG 3

b.

EG 1 = EG 2 = EG 3

c.

EG 1 < EG 2 < EG 3

d.

EG 1 < EG 2 > EG 3

Question number: 1655

» Oscillations and Waves » Periodic Motion - Period Frequency

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MCQ▾

Question

The amplitude of a particle executing S. H. M. with frequency of 35 Hz is 1cm. The maximum value of the acceleration of the particle is

Choices

Choice (4)Response

a.

b.

c.

d.

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