Question

si unit of resistivity

Answer 1

ohm.metre

hope it helps you follow please

Answer 2

Answer:

Ohm metre .

Derivation:

We know that ,

$r = \gamma \frac{l}{a} \\ \\ \gamma = r \frac{a}{l}$

unit of r (restivity = ohm)

unit of a (area of cross section) = m²

unit of l (length of wire) = m

$so \: \gamma = \: ohm \: \times \: \frac{ {m}^{2} }{m} \\ = > \gamma = \: ohm \: m$

Note : I have used lamda here as the sign of Resitivity as sign of "Rho" isn't available.