Question

In which of the following circuits the maximum power dissipation is observed?
(a) Pure capacitive circuit
(b) Pure inductive circuit
(c) Pure resistive circuit
(d) None of these

Answer 1

Explanation:

In an AC circuit, the power dissipated in the circuit is given by:

P=V

rms

I

rms

cosϕ

The ϕ is the phase different between the current and the volatge.

In the purely resistive and capacitive circuits, the phase difference is 90

∘

, so the power dissipated will be zero.

But in a purely resistive circuit, the voltage and current are in same phase so phase difference is zero. Therefore, it will have maximum power dissipation as cosϕ=1 in this case.

Answer 2

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c) pure resistive circuit.

Explanation:

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