Question

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Answer 1

write it in english your question is not clear

Answer 2

Explanation:

The resistivity of the wire is

$\rho = \dfrac{RA}{l}$

Where,

R = resistance of the wire

l = length of the wire

A = Area of cross section

The unit of resistivity is $\Omega-m$

The conductivity is the reciprocal of resistivity.

$\sigma = \dfrac{1}{\rho}$

So, the conductivity is

$\sigma = \dfrac{l}{RA}$

The unit of conductivity is $\Omega^{-1}-m^{-1}= mho$

Hence, mho is the unit of conductivity.