Question

if formula of resistivity is R×A/l. then, how does it not change with area or length?​

Answer 1

Answer:

resistivity is a characteristic property of the substance,hence it's fixed.

Answer 2

Answer:

First look at the equation (?). R= rho*L/A where rho is the resistivity characteristic of the material, L = length, A= cross sectional area. Thus L = A•R/rho