First slide

Dimensions of physical quantities

Question

The dimensions of electromotive force in terms of current A are

Easy

A

$[{MT}^{- 2} A^{- 2}]$
B

$[{ML}^{2} T^{- 2} A^{2}]$
C

$[{ML}^{2} T^{- 2} A^{- 2}]$
D

$[{ML}^{2} T^{- 3} A^{- 1}]$

Solution

Electromotive force = potential difference
$V = \frac{W}{q} = \frac{[{ML}^{2} T^{- 2}]}{[AT]} = [{ML}^{2} T^{- 3} A^{- 1}]$

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