NEET Physics: Questions 1589 - 1593 of 2098

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Question number: 1589

» Electronic Devices » Semiconductor Diode

MCQ▾

Question

Which of the following materials are crystalline?

(1) Copper (2) Sodium chloride

(3) Diamond (4) Wood

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

Choices

Choice (4) Response

a.

2 and 4 are correct

b.

1, 2 and 3 are correct

c.

1 and 3 are correct

d.

1 and 2 are correct

Question number: 1590

» Electronic Devices » Semiconductors

MCQ▾

Question

The energy band gap of Si is

Choices

Choice (4) Response

a.

0.70 eV

b.

1.1 eV

c.

Between 0.70 eV

d.

5eV

Question number: 1591

» Electronic Devices » Semiconductors

Assertion-Reason▾

Assertion (Ꭺ)

The temperature coefficient of resistance is positive for p-type semiconductors and negative for n-type semiconductors.

Reason (Ꭱ)

The effective charge carries in p-type semiconductors and holes and in n-type semiconductors are electrons.

Choices

Choice (4) Response

a.

Ꭺ is false but Ꭱ is true

b.

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

c.

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

d.

Ꭺ is true but Ꭱ is false

Question number: 1592

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

MCQ▾

Question

Three masses 600g, 300g, and 200g are suspended at the end of a spring are in equilibrium. When the 600g mass is removed, the system oscillates with a period of 4 seconds, when the 300 gm mass is also removed, it will oscillate with a period of

Choices

Choice (4) Response

a.

2.53 s

b.

1 s

c.

2 s

d.

125s

Question number: 1593

» Oscillations and Waves » Periodic Motion - Period Frequency

MCQ▾

Question

The periodic time of a body executing simple harmonic motion is 3 sec. After how much time from time t = 0, its displacement will be half of its amplitude

Choices

Choice (4) Response

a.

18sec

b.

16sec

c.

13sec

d.

14sec

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