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# What is the dimensional formula for resistivity?

$\begin {array} {1 1} (A)\;ML^2T^{-2} & \quad (B)\;ML^3T^{-1}Q^{-2} \\ (C)\;ML^2T^{-2}Q^{-2} & \quad (D)\;ML^3T^{-1}Q^{-1} \end {array}$

Can you answer this question?

Resistivity = $R \times \bigg(\large\frac{A}{L} \bigg)$ $= \bigg( \large\frac{V}{I} \bigg)$ $\times \bigg(\large\frac{A}{L} \bigg)$
On substituting the definitions for volt and ampere, one gets the result
Ans : (B)
answered Feb 15, 2014
edited Mar 14, 2014