First slide

Dimensions of physical quantities

Question

The dimensions of electromotive force in terms of current A are

Moderate

A

$[M T^{- 2} A^{- 2}]$
B

$[M L^{2} T^{- 2} A^{2}]$
C

$[M L^{2} T^{- 2} A^{- 2}]$
D

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

Solution

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

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