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  4. A coil of inductance L has an inductive reactance of XL in an AC circuit in which the effective current is I. The coil is made from superconducting material and has no resistance. The rate at which power is dissipated in the coil is

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Q. A coil of inductance $L$ has an inductive reactance of $X_{L}$ in an AC circuit in which the effective current is $I$. The coil is made from superconducting material and has no resistance. The rate at which power is dissipated in the coil is

Alternating Current

Solution:

It is a pure inductive circuit.
$ \theta =90^{\circ} $
$P =V_{\text {eff }} \cdot I_{\text {eff }} \cos \theta $
$=V_{\text {eff }} \cdot I_{\text {eff }} \cos 90^{\circ}=0 .$
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