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The average power loss in a pure induction coil will be-

The average power loss in a pure induction coil will be- Correct Answer 0

Concept:

  • LCR circuit: An electrical circuit constituting an inductor (L), capacitor (C), and resistor (R) connected in series or parallel is called an LCR circuit.

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  • For an inductor (L), if we consider the current (I) to be the reference axis, then voltage leads by 90°. For the capacitor (C), the voltage lags by 90°. This is represented by the phasor diagram. ​
    • Phasor diagrams are representations of the voltage(V) - current(I) relationship in AC circuits.
    • A phasor is a vector that rotates about the origin.

 

The phasor diagram is given as 

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The average power loss (P) in an A.C circuit is given by:

P = Vrms. I rms. Cos ϕ 

Here, ϕ is the phase difference between voltage and current. 

Explanation:

In the pure inductive circuit, the phase difference between voltage and current is 

ϕ = 90 ° 

So, the power loss will be

P = Vrms. I rms. Cos 90 ° 

 Cos 90 ° = 0

So, the power loss is zero. 

The correct option is zero. 

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