ISRO Electronics & Communication (ECE) 2017-2 - Question 65

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Topic: Network Theory

The average power consumed by the following circuit is
(Given $R=3.33~\Omega$, $X_{L}=2.5~\Omega$, $V_{rms}=20\angle 53.13^{\circ}V$)

  • A. 100 W
  • B. 110 W
  • C. 120 W
  • D. 160 W

Answer: C. 120 W

Explanation: The average power is dissipated only by the resistive component. $P_{avg} = \frac{V_{rms}^2}{R} = \frac{(20)^2}{3.33} = \frac{400}{3.33} = 120 \text{ W}$.

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