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Home  >>  JEEMAIN and AIPMT  >>  Physics  >>  Class12  >>  Current Electricity
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What is the dimensional formula for resistivity?

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


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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 by thanvigandhi_1
edited Mar 14, 2014 by thanvigandhi_1

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