Question

The SI Unit of resistivity is___

• A. $\Omega A$
• B. $\frac{\Omega }{m}$
• C. $\Omega m$
• D. $\frac{\Omega }{V}$

Answer 1

The correct option is C $\Omega m$

The SI unit of resistivity is $\Omega m$. It is a characteristic property of the material. Metals and alloys have very low resistivity in the range of ${10}^{-8}\Omega mto{10}^{-6}\Omega m$. They are good conductors of electricity. Insulators like rubber and glass have resistivity of the order of ${10}^{12}to{10}^{17}\Omega m$.