The dimensional formula for magnetic flux is (a) [ML²T⁻²A⁻¹] (b) [ML³T⁻²A⁻²] (c) [M⁰L⁻²T²A⁻²] (d) [ML²T⁻¹A²]

Answer: (a). φ = BA and F = BIl ⇒ [B] = [MLT⁻²][AL] = [MT⁻²A⁻¹] [φ] = [MT⁻²A⁻¹][L²] = [ML²T⁻²A⁻¹] So the answer is (a).

The dimensional formula for magnetic flux is | NEET 1999 (AIPMT)

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The dimensional formula for magnetic flux is

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Answer: (a)

$\phi = BA$ and $F = BIl \Rightarrow [B] = \frac{[\mathrm{MLT^{-2}}]}{[\mathrm{AL}]} = [\mathrm{MT^{-2}A^{-1}}]$
$[\phi] = [\mathrm{MT^{-2}A^{-1}}][\mathrm{L^2}] = [\mathrm{ML^2T^{-2}A^{-1}}]$
So the answer is (a).