NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 1292 - 1295 of 2320

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Question number: 1292

» Properties of Solids & Liquids » Latent Heat

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MCQ▾

Question

A bullet moving with a uniform velocity v, stops sudden after hitting the target and the whole mass melts be m, specific heat S, initial temperature 28°C, melting point 375 °C and the latent heat L. Then v is given by

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1293

» Atoms and Nuclei » Bohr Model

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MCQ▾

Question

According to Bohr’s theory the moment of momentum of an electron revolving in second orbit of hydrogen atom will be,

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1294

» Thermodynamics » Laws of Thermodynamics » First Law of Thermodynamics

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MCQ▾

Question

During the melting of a slab of ice at 273 K and one atmospheric pressure

(1) Positive work is done on the ice-water system by the atmosphere

(2) Positive work is done by ice-water system on the atmosphere

(3) The internal energy of the ice-water system increases

(4) The internal energy of the ice-water system decreases

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

Choices

Choice (4)Response

a.

2 and 4 are correct

b.

1 and 3 are correct

c.

1,2 and 3 are correct

d.

1 and 2 ate correct

Question number: 1295

» Properties of Solids & Liquids » Elastic Behavior

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MCQ▾

Question

Length of a wire is doubled, when 20 × 10 8 N/m 2 stress is applied on it. Its Young’s modulus of elasticity in N/m 2 will be

Choices

Choice (4)Response

a.

20 × 10 8

b.

20 × 10 9

c.

20 × 10 10

d.

10 × 10 8

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