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What is the power factor of a series RLC circuit under resonance condition?(a) 0(b) 1(c) Infinity(d) 100

Answer» Right choice is (b) 1

For explanation: The power factor for a series RLC circuit in resonance condition is always unity because the current is in phase with the voltage under resonance condition.

Φ=0^0 => cos ϕ = 1  i.e.  power factor = 1.


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