Physics Electronics SZABMU 2022
PMDC Verified Question 461 of 494
Efficiency of full wave rectifier circuit is almost _ than half wave rectifier circuit:
A
Four times
B
Double
C
Sixteen times
D
Same as
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Double
Concept:

Rectifier efficiency (\( \eta \)) represents the ratio of DC output power to the applied AC input power.

Solution:

  • A Half-Wave Rectifier wastes an entire half-cycle of the input wave. Its maximum theoretical efficiency is roughly \( 40.6\% \).


  • A Full-Wave Rectifier utilizes both the positive and negative half-cycles of the input wave. Its maximum theoretical efficiency is roughly \( 81.2\% \).


  • Comparing the two: \( 81.2\% \) is exactly double of \( 40.6\% \).


Why other options are incorrect:

  • Four times / Sixteen times: These drastically overestimate the efficiency ratio.


  • Same as: Incorrect, because utilizing the blocked half-cycle inherently increases power efficiency.

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