Question

On what factor does the resistance of a material depend? Define resistivity.

Answer 1

$\rho ={\rho }_o(1-\alpha \Delta T)$,

$where,$

$\rho =resitivity$

$T=temperature$

$\alpha =\text{constant}$

Hence, resistivity depends on temperature.

Defination: Resistivity is measure of the resisting power of a specified material to the flow of an electric current.