Question

Electrical resistivities of silver and nichrome at \( 20^{\circ} C \) are \( 1.6 \times 10^{-6} \) and \( 1.0 \times 10^{-4} \), then explain why silver is used as good conductor and nichrome is used in making filaments ?

Answer 1

Out of silver and copper, silver has less resistivity, that's why it is a good conductor as compared to copper. 

The material used in electrical heating devices must have high resistance. So, a material with high resistivity should be used from the table. Nichrome has the highest resistivity, it would have the highest resistance among all the given materials. Hence, it should be used for electrical heating devices.