Question

The magnitude of summation of powers of $M,L,T$ and $A$ in dimensional formula of resistivity of a conductor is. Given $R=\frac{\rho l}{A}$, where $\rho$ is the resistivity, $l$ is length and $A$ is area

Answer 1

Resistivity $=\frac{\text{resistance}\times \text{area}}{\text{length}}$
$=\frac{M{L}^2{T}^{-3}{A}^{-2}\times L^2}{L}=\left[M{L}^3{T}^{-3}{A}^{-2}\right]$