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Asked in GUJCET 2016 · Self-inductance and self-induced EMF
Idea: build the unit of L from its defining equations and compare.
From ε = L (dI)/(dt): L is measured in (V s)/A (volt second per ampere).
From Φ = LI: L is measured in (Wb)/A (weber per ampere).
Since V/A = Ω, the henry is also Ω s (ohm-second).
The mho is the reciprocal of the ohm, so mho-second is s/Ω, which is the farad, the unit of capacitance, not of inductance.
So the incorrect unit is mho-second.
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