Physics Electronics MDCAT 2018
PMDC Verified Question 480 of 494
The direction of current through the load resistance of a full-wave rectification circuit:
A
Inverts for positive cycle
B
Remains constant
C
Changes for every cycle
D
Inverts for negative cycle
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Remains constant
Concept:

The primary goal of any rectifier (half-wave or full-wave) is to convert bidirectional AC into unidirectional DC.

Solution:

  • In a full-wave rectifier, different diode pairs conduct during opposite halves of the AC cycle.


  • However, the physical topology of the circuit routes the current from both halves so that it always enters the load resistance from the exact same terminal.


  • Because the current always flows through the load in the same direction, the direction remains constant (unidirectional).


Why other options are incorrect:

  • If the current inverted or changed direction for any cycle, the output would still be alternating current (AC), rendering the rectifier useless.

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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