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A piece of aluminium and germanium each ...

A piece of aluminium and germanium each are cooled from `T_(1)K` to `T_(2)K`. The resistance of

A

Aluminium increases and that of germanium decreases

B

Each of them decreases

C

Aluminium decreases and that of germanium increases

D

Each of them increases

Text Solution

Verified by Experts

The correct Answer is:
C
In case of a conductor (Aluminium), when the temperature is decreased the resistance also decreases, where as in a semiconductor (Germanium) when the temperature is decreased the resistance increases.
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