Question

give an expression for reaistance​

Answer 1

Answer:

Resistance. The electrical resistance of a circuit component or device is defined as the ratio of the voltage applied to the electric current which flows through it: If the resistance is constant over a considerable range of voltage, then Ohm's law, I = V/R, can be used to predict the behavior of the material.

Answer 2

from eq. V=IR

R will be V(Potential diff.)÷I(Current)