Question

What is the dimensions of impedance ?

• A. $L^2{T}^{-3}{A}^{-2}$
• B. $M^{-1}{L}^{-2}{T}^3{A}^2$
• C. $M{L}^3{T}^{-3}{A}^2$
• D. $M^{-1}{L}^{-3}{T}^3{A}^2$

Answer 1

Answer: (A)

Impedance has the same dimensions as that of a resistance
$\therefore$ Resistance $R=\frac{\text{ Voltage }V}{\text{ current }I}\%$
$=\frac{\left[M{L}^2{T}^{-3}{I}^{-1}\right]}{[1]}=\left[M{L}^2{T}^{-3}{A}^{-2}\right]$