Question

SI unit of resistivity is

• A. ohm metre
• B. $ohmmetr{e}^{-1}$
• C. $ohmmetr{e}^{-2}$
• D. none of these

Answer 1

The correct option is A ohm metre

We all know,

$R=Resistivity\times \frac{length}{Area}$

and, $R$ have unit $\Omega$ and length and area have units $Meter$ and $Mete{r}^2$

therefore,

from the above formula ,

$Resistivity=\Omega \frac{Mete{r}^2}{Meter}$

therefore,

$Resistivity=\Omega -Meter$