# Show that an Ideal Inductor Does Not Dissipate Power in an Ac Circuit. - Physics

Short Note

Answer the following question.
Show that an ideal inductor does not dissipate power in an ac circuit.

#### Solution

Power = VIcosphi
For pure inductive circuit, the phase difference between current and voltage is pi/2.
∴ phi = pi/2, cos phi = 0
Therefore, zero power is dissipated. This current is sometimes referred to as watt-less current.

Concept: Power in Ac Circuit: the Power Factor
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