Question

Electrical resistivities of some substances at 20^oC are given below:

Answer the following questions using above data:
(a) Among silver and copper, which one is a better conductor? Why?
(b) Which material would you advise to be used in electrical heating devices and why?

Answer 1

(a) Silver is a better conductor due to its lower resistivity.
(b) Nichrome should be used in electrical heating devices due to very high resistivity.