# The dimensions of electrical resistance is

$(a)\;ML^2T^{-2}A^2\quad (b)\;ML^2T^{-3}A^{-2} \quad (c)\;ML^2T^{-3}A^2\quad (d)\;ML^2T^{-2}A^{-2}$

$R=\large\frac{V}{I}$
$\quad=\large\frac{ML^2T^{-3}A^{-1}}{A}$
$\quad=ML^2T^{-3}A^{-2}$
Hence the dimensions of electrical resistance is $ML^2T^{-3}A^{-2}$
Hence b is the correct answer.

edited Jan 9, 2014 by meena.p