Question

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
• B. $P$ is conductor and $Q$ is semiconductor
• C. $P$ is n-type semiconductor and $Q$ is $p-$ type conductor
• D. None of the above

Answer 1

The correct option is A $P$ is semiconductor and $Q$ is conductor

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