ISRO Electrical Engineering (EE) 2015 - Question 18

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The figure shows a half wave rectifier circuit with input voltage v(t) = 10 sin(100πt) volts. Assuming ideal diode characteristics with zero forward voltage drop and zero reverse current, the average power consumed in watts by the load resistance RL is [Figure description: An AC voltage source V(t) (with + at top) in series with an ideal diode (in the top wire, conducting left to right) and a load resistor RL = 100 Ω, forming a single series loop.]

  • A. 1 Watts
  • B. 0.25 Watts
  • C. Zero Watts
  • D. 0.5 Watts

Answer: B. 0.25 Watts

Explanation: Half-wave rectifier: Vrms = Vm/2 = 5 V; P = 25/100 = 0.25 W.

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