NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1681 - 1686 of 2320

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Question number: 1681

» Oscillations and Waves » Simple Harmonic Motion » Oscillations of a Spring

Edit
MCQ▾

Question

A spring of force constant k is cut into two pieces such that one piece is double the length of the other. Then the short piece will have a force constant of

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1682

» Electronic Devices » Semiconductors

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MCQ▾

Question

The energy gap for diamond is nearly

Choices

Choice (4)Response

a.

1 eV

b.

4 eV

c.

6 eV

d.

2 eV

Question number: 1683

» Electronic Devices » Semiconductors

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MCQ▾

Question

The intrinsic semiconductor becomes an insulator at

Choices

Choice (4)Response

a.

0°C

b.

300 K

c.

0 K

d.

-100°C

Question number: 1684

» Electronic Devices » Semiconductor Diode

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MCQ▾

Question

A piece of copper and the other of germanium are cooled from the room temperature to 80 K, then which of the following would be wrong statements?

(1) Resistance of each Increase

(2) Resistance of each Decrease

(3) Resistance of copper increases while that of germanium decreases

(4) Resistance of copper decreases while that of germanium increases

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

Choices

Choice (4)Response

a.

1 and 2 are correct

b.

2 and 4 are correct

c.

1,2 and 3 are correct

d.

1 and 3 are correct

Question number: 1685

» Oscillations and Waves » Simple Harmonic Motion » Oscillations of a Spring

Edit
MCQ▾

Question

A spring of force constant k is cut into two pieces such that one piece is double the length of the other. Then the long piece will have a force constant of

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1686

» Oscillations and Waves » Simple Harmonic Motion » Energy

Edit
Assertion-Reason▾

Question

Assertion (Ꭺ)

The graph of total energy of a particle in SHM w. r. t, position is a straight line with zero slope.

Reason (Ꭱ)

Total energy of particle in SHM remains constant throughout its motion.

Choices

Choice (4)Response

a.

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

b.

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

c.

Ꭺ is false but Ꭱ is true

d.

Ꭺ is true but Ꭱ is false

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