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PhysicsNEET 2021Resonance, power and power factor

Alternating Current

A series LCR circuit containing a 5.0 H inductor, capacitor and resistor is connected to a 230 V variable-frequency ac source. The angular frequencies of the source at which the power transferred to the circuit is half the power at the resonant angular frequency are likely to be:

  1. A.25 rad/s and 75 rad/s
  2. B.50 rad/s and 25 rad/s
  3. C.46 rad/s and 54 rad/s✓
  4. D.42 rad/s and 58 rad/s

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