Question

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

• A. P and Q are conductors of different materials
• B. P is N-type semiconductor and Q is P-type Semiconductor
• C. P is semiconductor and Q is conductor
• D. P is conductor and Q is semiconductor

Answer 1

Answer: (D)

P is conductor and Q is semiconductor

Answer 2

Conductor has positive temperature coefficient of resistance but semiconductor has negative temperature coefficient of resistance.