Physics Electronics BUMHS 2022
PMDC Verified Question 466 of 494
A circuit that converts pulsating voltage of the rectifier to smooth voltage is known as:
A
Conductor
B
Transformer
C
Filter
D
Choke
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Filter
Concept:

The immediate output of a rectifier is "pulsating DC," which contains both a DC component and an unwanted AC component (ripple).

Solution:

  • To remove the AC ripple and provide a smooth, steady DC voltage, energy storage components are used.


  • Capacitors store energy during voltage peaks and release it during dips, smoothing out the pulses.


  • The circuit arrangement that performs this task is universally called a Filter.


Why other options are incorrect:

  • Choke: An inductor used within some filter circuits, but "filter" is the inclusive term for the whole smoothing circuit.


  • Transformer: Changes AC voltage levels before rectification.


  • Conductor: Just a wire, it provides no smoothing.

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