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.

The quiz comprises of 10 questions, which are randomly selected from a large pool of questions. After completion, you can refresh the page and try the quiz again for a new set of 10 questions.

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1. A teacher has a large tank of water in which he wants to set up a convection current.

Which of the following arrangements would do this?

cooling at Y

heating at Y

cooling at X

heating at Z

2. The diagram shows a liquid-in-glass thermometer.

At $0^{\circ}\text{C}$, the length of the liquid column is 2.0 cm. At $100^{\circ}\text{C}$, the length of the liquid column is 22.0 cm.

What is the length of the liquid column at $40^{\circ}\text{C}$?

8.0 cm

10.0 cm

8.8 cm

6.0 cm

3. When ice melts to become water, which force must be overcome?

The force between molecules

The attraction between the atoms in a molecule

The attraction between electrons and the nucleus

The force of gravity

4. When ice changes into water at $0^{\circ} \, C$,

1. Work is done in breaking the molecular structure of ice in solid state.
2. Internal energy is increased.
3. Energy is absorbed to raise the temperature.

1 and 2 only

1, 2 and 3

2 only

1 and 3 only

5. Many gas appliances such as ovens and heaters use a small flame to ignite the main burner.

In order to make sure that the small flame is burning, a temperature-measuring device is inserted into the flame.

What is the most suitable device to use?

a water manometer

a mercury manometer

a clinical thermometer

a thermocouple thermometer

6. 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 on his skin is a good conductor of heat.

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

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

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

7. A substance is heated in an enclosed space until it becomes a gas.

After the heater is removed, the temperature is recorded at regular intervals. The graph shows temperature plotted against time.

What does the section PQ represent?

boiling

condensing

melting

solidifying

8. In a Brownian motion experiment involving smoke particles in air, heavy smoke particles settle quickly but very small smoke particles remain suspended for long periods of time.

Which statement explains why the small smoke particles do not settle?

Random molecular bombardments by air molecules keep the particles suspended.

The Earth's gravitational field does not act on very small particles.

The small smoke particles have the same density as the air.

Air pressure has a greater effect on smaller particles.

9. What makes a thermometer sensitive to small changes in temperature?

A bulb with a thin glass wall

A stem with a thick glass wall

A very narrow bore

A shiny liquid in its bore

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

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

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

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

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

Atoms vibrate and hit atoms at the cold end.

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