The dimension of magnetic field in $M, L, T$ and $C$ (Coulomb) is given as :

M T^{- 1} C^{- 1}

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M T^{- 2} C^{- 1}

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M L T^{- 1} C^{- 1}

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M T^{2} C^{- 2}

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Solution

The correct option is A $M T^{- 1} C^{- 1}$
Magnetic force $F = i B l$
$⟹$ Magnetic field $B = \frac{F}{i l}$
Dimensions of magentic field $[B] = \frac{M L T^{- 2}}{[C T^{- 1}] [L]}$
$\Rightarrow [B] = ⌊ M T^{- 1} C^{- 1} ⌋$

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