# Properties of Solids & Liquids (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream-SA (Class 11) Physics): Questions 18 - 21 of 27

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## Question number: 18

» Properties of Solids & Liquids » Thermal Expansion

MCQ▾

### Question

What is actual meaning of coefficient of superficial expansion?

### Choices

Choice (4) Response

a.

Coefficient of total expansion due to change in pressure

b.

The total expansion of area due to change in temperature

c.

The fractional change in area per unit rise of temperature

d.

All of the above

## Question number: 19

» 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: 20

» Properties of Solids & Liquids » Terminal Velocity

MCQ▾

### Question

Two equal drops of rain falling in air with a constant velocity of 20 cm/sec. The drops mixed up and form a single drop, what would be their terminal velocity (in cm/sec)?

### Choices

Choice (4) Response

a.

71.74

b.

15.87

c.

25.25

d.

31.74

## Question number: 21

» Properties of Solids & Liquids » Bernoulli's Principle and Its Applications

MCQ▾

### Question

A body floating in oil has 50 % of its volume on the surface of the oil. When the same body floats in water, 30 % of its volume is above the water surface. The relative density of oil is –

### Choices

Choice (4) Response

a.

1.75

b.

2.0

c.

1.5

d.

1.66

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