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MHT CET Medical202621 April 2026Evening ShiftPhysicsAlternating CurrentActual

In series LCR circuit, R = 10 and impedance is 30 . An rms voltage 210 V is applied across the circuit. The true power consumed in A.C. circuit in watt is

Options

  1. A49
  2. B220
  3. C490
  4. D1470

Correct answer

C. 490

Step-by-step solution

Given R = 10 , Z = 30 , and V_ rms = 210 V . The rms current in the circuit is given by: I_ rms = V_ rms Z Substituting the given values: I_ rms = 210 30 = 7 A The true power consumed in an A.C. circuit is given by: P = I_ rms ^2 R Substituting the values of I_ rms and R : P = (7)^2 10 = 49 10 = 490 W Answer: 490

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