Q. A piece of copper and other of germanium are cooled from the room temperature to 80 K, then
A) Resistance of each will increase
B) Resistance of each will decrease
C) The resistance of copper will increase, while that of germanium will decrease
D) The resistance of copper will decrease, while that of germanium will increase
Explanation
(d) The temperature coefficient of resistance of copper is positive and germanium is negative.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.