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JIPMER2014PhysicsAlternating Current

Real power consumption in a circuit is least when it contains.

Options

  1. Ahigh R , low L
  2. Bhigh R , high L
  3. Clow R , high L
  4. Dhigh R , low C

Correct answer

C. low R , high L

Step-by-step solution

Power consumption =I_ rms V_ rms where, is power factor. = R Z For to be minimum, R should be minimum and Z should be higher. So, higher Z (impedance), L (inductance) should be high.

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