Question

The resistance of a conductor of length x ir r. If its area of cross sections is a, what is its resistivity? What's is its unit? ​

Answer 1

Answer:

Resistivity is,

$\frac{ra}{x}$

unit of Resistivity : Ohm m

Explanation:

Resistance (R) = Resistivity × length / Area

Rearranging,

we get, Resistivity (rho) = R × A / L

substituting given values,

where, R = r

A = a

L = x

we get,

rho = r × a / x

Resistivity unit is always ohm m (ohm meter)