Q. Constantan wire is used in making standard resistances because its
A) Specific resistance is low
B) Density is high
C) Temperature coefficient of resistance is negligible
D) Melting point is high
Explanation
(c) Due to the negligible temperature co-efficient of resistance of constantan wire, there is no change in it’s resistance value with change in temperature
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.