KVPY Stream-SA (Class 11) Physics: Questions 224 - 229 of 242

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Question number: 224

» Ray Optics » Power of a Lens

MCQ▾

Question

A convex lens of focal length 39 cm and a concave lens of focal length 20 cm are placed in close contact with one another. The power of the combination is –

Choices

Choice (4) Response

a.

0.41 D

b.

-2.43 D

c.

2.43 D

d.

-0.41 D

Question number: 225

» Kinetic Theory of Gases » Degrees of Freedom

MCQ▾

Question

The speed of the sound in a gas at S. T. P. is 337 ms-1 and the density of the gas is 0.9kgm3 . The number of degree of freedom of a molecule of the gas is –

Choices

Choice (4) Response

a.

424

b.

200

c.

375

d.

100

Question number: 226

» Electrostatics » Electric Potential

MCQ▾

Question

8 identical water drops, carrying equal charge q and having the same potential V, merge together. The potential of the new water drop is –

Choices

Choice (4) Response

a.

4V

b.

16V

c.

8V

d.

2V

Question number: 227

» Wave Optics » Interference

MCQ▾

Question

In a Young’s experiment, the interference pattern is found to have an intensity ratio between the bright and dark fringes as 16. The intensity ratio of the two interfering light waves is –

Choices

Choice (4) Response

a.

35

b.

259

c.

925

d.

53

Question number: 228

» Properties of Solids & Liquids » Heat Transfer » Convection

MCQ▾

Question

275 g of ice is mixed with 175 g of water at temperature 900C. The latent heat of ice is 80 cal/g and the specific heat of water is 1 cal/g-0C. Assuming no heat loss to the environment, the amount of ice which does not melt is:

Choices

Choice (4) Response

a.

0

b.

78.13 g

c.

52.36 g

d.

94.35 g

Question number: 229

» Kinetic Theory of Gases » Equation of State of a Perfect Gas

MCQ▾

Question

If for a gas RCV=0.4 , The atomicity of the gas is-

Choices

Choice (4) Response

a.

Monoatomic

b.

Cannot determine

c.

Triatomic

d.

Diatomic

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