NEET-XII-Physics
03: Current Electricity
- #7A silver wire has a resistance of 2.1 ``\Omega`` at 27.5 °C, and a resistance of 2.7 ``\Omega`` at 100 °C. Determine the temperature coefficient of resistivity of silver.
Ans : Temperature, T1 = 27.5°C
Resistance of the silver wire at T1, R1 = 2.1 ``\Omega``
Temperature, T2 = 100°C
Resistance of the silver wire at T2, R2 = 2.7 ``\Omega``
Temperature coefficient of silver = α
It is related with temperature and resistance as
Therefore, the temperature coefficient of silver is 0.0039°C-1.