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When one end of a metal is heated, the free electrons are energised and move to the other end. It heats up the other end of the metal.

1. Free electrons move to the other end.
2. The metal heats up uniformly.
3. The electrons lose energy.
4. The metal remains cold.

Correct answer: Free electrons move to the other end.

Solution

When one end of a metal is heated, free electrons gain energy and move to the cooler end, transferring heat through conduction.

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