Physics Electronics MDCAT 2017
PMDC Verified Question 481 of 494
Output voltage of rectifier is not smooth. It can be made smooth by using a circuit known as:
A
Wheat stone circuit
B
Filter circuit
C
Bridge circuit
D
Ripple circuit
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Filter circuit
Concept:

The output of a standard rectifier is a pulsating direct current, meaning it flows in one direction but its magnitude fluctuates.

Solution:

  • To convert this pulsating DC into a steady, constant DC voltage (similar to a battery), smoothing components are required.


  • Capacitors or inductors are introduced to bypass AC ripples or choke them, respectively.


  • A circuit designed specifically for this smoothing operation is called a filter circuit.


Why other options are incorrect:

  • Wheat stone circuit: Used for measuring unknown electrical resistance.


  • Bridge circuit: A configuration of diodes used for rectification, not post-rectification smoothing.


  • Ripple circuit: Not a standard electronic term; "ripple" is the very flaw we are trying to remove.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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