Question

Which of the following is the S.I. unit of resistivity ?

• A. $V.m$
• B. $\Omega .m^2$
• C. $\Omega .cm$
• D. $\Omega .m$

Answer 1

The correct option is D $\Omega .m$

Electrical resistivity is an intrinsic property that quantifies how strongly a given material opposes the flow of electric current. A low resistivity indicates a material that readily allows the movement of electric charge.
Resistivity is commonly represented by the Greek letter $\rho$ (rho).

$\rho =\frac{R\times A}{L}$

Hence from the above relation we can see that the SI unit of electrical resistivity is the $ohm-meter(\Omega -m)$.So correct option is D