NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1580 - 1583 of 2320

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Question number: 1580

» Atoms and Nuclei » Mass Defect

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MCQ▾

Question

If the mass defect in the formation of helium from hydrogen is 0.5%, then the energy obtained, in kWh, in forming helium from 1 kg of hydrogen will be,

Choices

Choice (4)Response

a.

1.25 ⨯ 10 6

b.

1.25

c.

125 ⨯ 10 4

d.

1.25 ⨯ 10 8

Question number: 1581

» Oscillations and Waves » Simple Harmonic Motion » Phase

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MCQ▾

Question

The composition of two simple harmonic motions of equal periods at right angle to each other and with a phase difference of results in the displacement of the particle along,

Choices

Choice (4)Response

a.

Circle

b.

Figure of 8

c.

Ellipse

d.

Straight line

Question number: 1582

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

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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.

1,2 and 3 are correct

b.

1 and 3 are correct

c.

1 and 2 are correct

d.

2 and 4 are correct

Question number: 1583

» Electronic Devices » Semiconductors

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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 N-type germanium in which electrons and holes are equal in number

c.

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

d.

The material obtained will be P-type germanium

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