NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1581 - 1583 of 2142

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Question number: 1581

» Oscillations and Waves » Simple Harmonic Motion » Force, Velocity, and Acceleration

MCQ▾

Question

For a particle executing simple harmonic motion, which of the following statements is correct?

(1) The total energy of the particle always remains the same

(2) The restoring force always directed towards a fixed point

(3) The restoring force is maximum at the extreme positions

(4) The acceleration of the particle is maximum at the equilibrium position

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

Choices

Choice (4) Response

a.

1 and 3 are correct

b.

1,2 and 3 are correct

c.

2 and 4 are correct

d.

1 and 2 are correct

Question number: 1582

» Electronic Devices » Semiconductors

MCQ▾

Question

Electronic configuration of germanium is 2,8, 18 and 4. To make it extrinsic semiconductor small quantity of antimony is added,

Choices

Choice (4) Response

a.

The material obtained will be N-type germanium which has less electrons than holes at room temperature

b.

The material obtained will be P-type germanium

c.

The material obtained will be N-type germanium in which electrons and holes are equal in number

d.

The material obtained will be N-type germanium which has more electrons than holes at room temperature

Question number: 1583

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

MCQ▾

Question

The periodic time of a body executing simple harmonic motion is 5 sec. After how much time from time t = 0, its displacement will be half of its amplitude

Choices

Choice (4) Response

a.

b.

c.

d.

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