Question

The conductivity of a material is 5 mho/m. What is it’s resistivity?

• A. 5 ohm m
• B. 0.2 ohm m
• C. 25 ohm m
• D. None of these.

Answer 1

The correct option is B 0.2 ohm m

Conductivity is the inverse of resistivity.
So $\sigma =\frac{1}{\rho }$
Therefore $\rho =\frac{1}{5}=0.2ohm-m$.