What is the relation between voltage and current in AC circuit containing only inductance?

What is the relation between voltage and current in AC circuit containing only inductance?
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1 Answer

Answer :

Current (I) is lags behind the voltage by 90°.
I = V/XL amps.
XL = 2πfL ohms.
P = I * V * cosϕ watts. (Where cosϕ is 90 because current lags behind voltage by
90°. So cosϕ 90° = 0)
∴ P = I * V * 0 = 0 watts.
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