Wires P and Q have the same resistance at ord | vedclass

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(D) The resistance of a conductor increases with an increase in temperature because the positive temperature coefficient of resistance is positive. Co

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$P$ is conductor and $Q$ is semiconductor

Vedclass · Answer

(D) The resistance of a conductor increases with an increase in temperature because the positive temperature coefficient of resistance is positive. Conversely,the resistance of a semiconductor decreases with an increase in temperature because it has a negative temperature coefficient of resistance. Since the resistance of $P$ increases upon heating,$P$ must be a conductor. Since the resistance of $Q$ decreases upon heating,$Q$ must be a semiconductor. Therefore,the correct conclusion is that $P$ is a conductor and $Q$ is a semiconductor.

Wires $P$ and $Q$ have the same resistance at ordinary (room) temperature. When heated,the resistance of $P$ increases and that of $Q$ decreases. We conclude that

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