Question

What are the dimensions of impedance?

• A. $\left[ ML ^{2} T ^{-3} I ^{-2}\right]$
• B. $\left[ M ^{-1} L ^{-2} T ^{3} I ^{2}\right]$
• C. $\left[ ML ^{3} T ^{-3} I ^{-2}\right]$
• D. $\left[ M ^{-1} L ^{-3} T ^{3} I ^{2}\right]$

Answer 1

Answer: (A)

Impedance has the same dimensions as that of a resistance.
Resistance, $R=\frac{\text { Voltage } V}{\text { Current } I}=\frac{\left[ ML ^{2} T ^{-3} I ^{-1}\right]}{[ I ]}$
$=\left[ ML ^{2} T ^{-3} I ^{-2}\right]$