Physics Electromagnetic Induction DUHS 2023
PMDC Verified Question 32 of 69
A transformer is used to:
A
Transform alternating current and voltage
B
Convert alternating current into direct current
C
Convert mechanical energy into electrical energy
D
Convert direct current into alternating current
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option A: Transform alternating current and voltage
Concept:

A transformer is a passive electrical device used to shift the balance of voltage and current in an AC system.

Solution:

  • Because transformers rely on continuous changes in magnetic flux to operate, they strictly transform alternating current and voltage magnitudes (stepping them up or down).


Why other options are incorrect:

Converting AC to DC is done by a rectifier. Converting mechanical to electrical energy is done by a generator. Converting DC to AC is done by an inverter.

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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