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Question

In a half wave rectifier, the output is taken across a 90Ω load resistor. If the resistance of diode in forward biased condition is 10Ω, the efficiency of rectification of ac power into dc power is
  1. 81.2%
  2. 36.54%
  3. 73.08%
  4. 40.6%

A
81.2%
B
73.08%
C
36.54%
D
40.6%
Solution
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The efficiency η of half wave rectifier is given by, η=4π2RLrf+RL
where, RL is the resistance of load resistor and rf is the resistance of diode in forward biased condition.

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