Class 10 Physics · Chapter 2 · Test 1
Test 1: Conduction and Convection
29 questions · 25 min · 29 marks
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Sample questions
The first 5 of 29. Try each one, then tap to see the answer.
Question 1
Which method of heat transfer requires direct contact between particles?
- AConvection
- BRadiation
- CConduction
- DEvaporation
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Answer: C
Conduction is the process by which heat is transferred through direct contact between particles in a material.
Question 2
What causes convection currents in liquids and gases?
- AThe continuous movement of particles in all directions
- BThe rising of warm regions and sinking of cooler regions
- CThe conduction of heat through the medium
- DThe reflection of heat waves
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Answer: B
Heated fluid becomes less dense and rises while cooler fluid moves in to take its place.
Question 3
The natural phenomenon caused by convection currents is:
- Aearthquakes
- Bland and sea breezes
- Cmagnetic fields
- Dsolar eclipses
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Answer: B
Land and sea breezes are examples of convection currents in nature.
Question 4
When two objects at different temperatures come into contact, thermal energy flows from:
- Athe cooler object to the hotter object
- Bthe hotter object to the cooler object
- Cboth objects equally
- Dneither object
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Answer: B
Thermal energy flows from the hotter object to the cooler one, a process known as heat transfer.
Question 5
Thermal energy continues to transfer from one object to another until:
- Athermal equilibrium is reached
- Bthe objects melt
- Cthe objects become solid
- Dthe objects stop vibrating
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Answer: A
Heat transfer continues as long as there is a temperature difference, until thermal equilibrium is reached.
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