Dimensional formula of resistivity is

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(B) The formula for resistivity $(\rho)$ is given by $\rho = \frac{R A}{l}$,where $R$ is resistance,$A$ is area,and $l$ is length.Resistance $R = \fra

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$[M L^3 A^{-2} T^{-3}]$

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(B) The formula for resistivity $(ho)$ is given by $ho = \frac{R A}{l}$,where $R$ is resistance,$A$ is area,and $l$ is length.Resistance $R = \frac{V}{I} = \frac{W}{qI} = \frac{[M L^2 T^{-2}]}{[A T] [A]} = [M L^2 T^{-3} A^{-2}]$.Area $A = [L^2]$.Length $l = [L]$.Substituting these into the formula: $ho = \frac{[M L^2 T^{-3} A^{-2}] 	imes [L^2]}{[L]} = [M L^3 T^{-3} A^{-2}]$.

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