Physics · May / June 2021 · Paper 11 · Question 15
5054Conduction
A copper rod is heated at one end. Which statement describes how heat transfer occurs in the copper?
- AEnergetic copper molecules move from the cooler end to the hotter end.
- BEnergetic copper molecules move from the hotter end to the cooler end.
- CEnergetic free electrons move from the cooler end to the hotter end.
- DEnergetic free electrons move from the hotter end to the cooler end.
As printed in the paper
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Correct answer: D. Energetic free electrons move from the hotter end to the cooler end.
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