-
The resistivity (specific resistance) of a copper wire
-
- increases with increase in its temperature
- decreases with increase in its cross-section
- increases with increase in its length
- increases with increase in its cross-section
Correct Option: A
Resistivity of copper wire increases with increase in temprature as ρt = ρ0(1 + αt)
Copper being a metal has positive coefficient of resistivity.
