Physics Electronics PMC 2021
PMDC Verified Question 474 of 494

If a half-wave rectifier is connected to a 50 Hz AC mains, the number of DC pulses generated per second in the output voltage is:
A
25
B
50
C
100
D
75
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: 50
Concept:

The ripple frequency of a half-wave rectifier is exactly equal to the frequency of the input AC supply.

Solution:

A half-wave rectifier permits only one polarity of current (one peak) to pass through per input cycle, while blocking the other. Since the input frequency is \( 50\text{ Hz} \) (50 full cycles per second), there will be exactly 50 pulses of DC output per second.

Why other options are incorrect:

  • 100 is the output pulse frequency of a full-wave rectifier.


  • 25 and 75 do not correspond to the physics of half-wave rectification.

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