KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics: Questions 144 - 147 of 253

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Question number: 144

» Laws of Motion » Static and Kinetic Friction

MCQ▾

Question

A block, resting on the top of a plane inclined at 450 with the horizontal, slides down with an acceleration of . Calculate the coefficient of kinetic friction.

Choices

Choice (4) Response

a.

b.

2

c.

d.

Question number: 145

» Properties of Solids & Liquids » Specific Heat Capacity

MCQ▾

Question

A 15.0 W electrical heater is used to heat a container filled with 0.5 kg of water. It is found that the temperature of the water and the container rise by 4 K in 20 minutes. The container is then emptied, dried, and filled with 3 kg of oil. It is now observed that the same heater raises the temperature of the container-oil system by 3 K in 25 minutes. Assuming no other heat losses in any of the processes, the specific heat capacity of the oil is,

Choices

Choice (4) Response

a.

1700 JK-1 kg-1

b.

1800 JK-1 kg-1

c.

1900 JK-1 kg-1

d.

1500 JK-1 kg-1

Question number: 146

» Ray Optics » Lens Maker's Formula and Lens Formula

MCQ▾

Question

A point source of light is moving at a rate of 2 cm-s–1 towards a thin convex lens of focal length 10 cm along its optical axis. When the source is 15 cm away from the lens the image is moving at

Choices

Choice (4) Response

a.

8 cm-s–1 away from the lens

b.

4 cm-s–1 away from the lens

c.

4 cm-s–1 towards the lens

d.

8 cm-s–1 towards the lens

Question number: 147

» Thermodynamics » Concept of Temperature

MCQ▾

Question

An open mouthed bottle contains a gas at 500 C. To what temperature should the gas be heated so that half mass of the gas may leave it?

Choices

Choice (4) Response

a.

3730 C

b.

3800 C

c.

4440 C

d.

3500 C

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