Practice MCQs For Thermal Physics

This quiz contains practice questions for GCE ‘O’ level topic: Thermal Physics. There are explanations for some of the questions after you submit the quiz. If you could not figure out why a particular option is the answer, feel free to drop a comment below or ask a question in ‘O’ & ‘A’ Level Discussion section of the forum. If you wish to contribute questions to this quiz, please contact us.

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1. When substance A and B are both heated with the same heater, the temperature of A rises faster than that of B. What can we conclude about A and B?

A has a higher heat capacity than B.

A has a lower specific heat capacity than B.

A has a higher specific heat capacity than B.

A has a lower heat capacity than B.

2. A swimmer climbs out of a swimming pool on a warm, dry day. Almost immediately he begins to feel cold.

Why is this?

The water allows a convection current to remove heat from his skin.

The water prevents infra-red radiation from reaching the body.

The water on his skin is a good conductor of heat.

The water takes latent heat from his body in order to evaporate.

3. A person cannot unscrew the lid of a jar of jam. He finds that the lid can be unscrewed after it has been held under hot, running water for a few seconds.

Why is this?

The air pressure in the jar falls.

The lid expands.

The jam melts.

The glass expands.

4. When one end of a rod is heated, heat energy is transferred down the rod by

the air around the rod, which sets up a convection current after being heated.

hot molecules moving along the rod.

transfer of energy from one molecule to the next.

convection currents set up within the rod.

5. The diagram shows a cross-section through a rain-water puddle formed in a shallow hole in a road surface.

Over a period of time, air temperature, wind speed and win direction remains constant.

What happens to the rate of evaporation of water from the puddle?

It remains constant.

It increases, because the surface area decreases.

It decreases, because the surface area decreases.

It increases, because the puddle gets shallower.

6. Heat energy is supplied at the same rate to 100 g of paraffin and to 100 g of water in similar containers.

Why does the temperature of the paraffin rise more quickly?

The paraffin has a larger specific heat capacity than water.

The paraffin has a smaller specific heat capacity than water.

The paraffin is more dense than water.

The paraffin is less dense than water.

7. Which instrument is most suitable for measuring a rapidly changing temperature?

clinical thermometer

thermocouple

alcohol-in-glass thermometer

mercury-in-glass thermometer

8. What is the definition of heat capacity?

the quantity of heat required to change 1 kg of a substance from solid to liquid without a change in temperature

the quantity of heat required to raise the temperature of 1 kg of a substance through $1^{\circ} \text{C}$

the quantity of heat required to convert an object from solid to liquid without a change in temperature

the quantity of heat required to raise the temperature of an object through $1^{\circ} \text{C}$

9. The diagram shows four similar cans. Each can contains the same volume of water initially at $80^{\circ}C$. After five minutes, which can will contain the coolest water?

D

A

C

B

10. A rod of metal is heated at one end.

Which statement best describes the conduction of heat through the metal?

Free electrons vibrate and pass energy to free electrons further along the rod.

Atoms move from the hot end and hit electrons at the cold end.

Free electrons move from the hot end and hit atoms further along the rod.

Atoms vibrate and hit atoms at the cold end.

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