What are the units of magnetic permeability?

W b A^{- 1} m^{- 1}

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W b^{- 1} A m

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W b A m^{- 1}

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W b A^{- 1} m

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Solution

The correct option is A $W b A^{- 1} m^{- 1}$
From Biot Savart's law
$B = \frac{μ_{o}}{4 π} \frac{i . d l s i n θ}{r^{2}}$
$μ_{o} = \frac{4 π B r^{2}}{i d l s i n θ} = \frac{W b m^{- 2} m^{2}}{A . m} = W b A^{- 1} m^{- 1}$

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