Single Choice

Wire $$P$$ and $$Q$$ have the same resistance at a ordinary room temperature .When heated resistance at a ordinary room temperature .When heated resistance of $$P$$ increases and that of $$Q$$ decreases. we conclude that

A$$P$$ is semiconductor and $$Q$$ is conductor
Correct Answer
B$$P$$ is conductor and $$Q$$ is semiconductor
C$$P$$ is n-type semiconductor and $$Q$$ is $$p-$$ type conductor
DNone of the above

Solution

Conductor has positive temperature coefficient of resistance but semiconductor has negative temperature coefficient of resistance. Hence, $$P$$ is semiconductor and $$Q$$ is conductor.

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