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T m² A⁻¹ is the unit of the ______ physical quantity.

Asked in GSEB Board August 2020 · Self-inductance and self-induced EMF

Answer: (3) Inductance

Step-by-step solution

Idea: build the unit up from relations you know.

T m² is field times area, which is magnetic flux: 1 T m²=1 Wb.

So T m² A⁻¹=Wb A⁻¹, flux per unit current.

From Φ=LI, inductance is L=Φ/I, measured in Wb A⁻¹=H.

So T m² A⁻¹ is the unit of inductance.

Why the other options are wrong

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