First slide

Dimensions of physical quantities

Question

The dimensional formula for magnetic flux is

Easy

A

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

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

$[M^{0} L^{- 3} T^{- 2} A^{- 2}]$
D

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

Solution

$ϕ = B A = \frac{F}{I L} \cdot A = [\frac{{MLT}^{- 2}}{AL}] [L^{2}]$
$= [M L^{2} T^{- 2} A^{- 1}]$

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