The maximum efficiency of a half-wave rectifier is

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SSC JE EE Previous Year Paper 4 (Held On: 24 Jan 2018 Morning)
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  1. 33.3 %
  2. 40.6 %
  3. 66.6 %
  4. 72.9 %

Answer (Detailed Solution Below)

Option 2 : 40.6 %
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Detailed Solution

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Concept:

The efficiency of a rectifier is defined as the ratio of dc output power to input power.

The efficiency of a half-wave rectifier will be:

VDC = DC or average output voltage

RL = Load Resistance

For a half-wave rectifier, the output DC voltage or the average voltage is given by:

Also, the RMS voltage for a half-wave rectifier is given by:

Calculation:

The efficiency for a half-wave rectifier will be:

For Half wave rectifier maximum efficiency = 40.6%

NoteFor Full wave rectifier maximum efficiency = 81.2%

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