Question

The dimensional formula of permeability of free space $\mu_0$ is

• A. $[MLT^{-2}A^{-2}]$
• B. $[M^0 L^1 T]$
• C. $[M^0 L^2 T^{-1}A^2]$
• D. none of these

Answer 1

Answer: (A)

$[MLT^{-2}A^{-2}]$

Answer 2

Permeability of free space
$\mu_0=\frac{2\pi \times \, force \, \times \, distance}{current \, \times \, current \, \times \, length}$
Dimensional formula of $\mu_0=\frac{[MLT^{-2}][L]}{[A][A][L]}$
$=[MLT^{-2}A^{-2}]$