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In an A.C. circuit, the value of power factor is:
(a)Unity when the circuit contains an ideal inductance only
(b)Unity when the circuit contains an ideal resistance only
(c)Zero when the circuit contains an ideal resistance only
(d)Unity when the circuit contains an ideal capacitance only

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Important Questions on AC Circuits
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HARD
Two circuits are shown in figure and . At a frequency of _______ the average power dissipated in one cycle will be the same in both the circuits.

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