Physics Electromagnetic Induction NUMS 2022
PMDC Verified Question 56 of 69
Transformer works on the principle of:
A
Half wave rectification
B
Self-induction
C
Mutual induction
D
Full wave rectification
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Mutual induction
Concept:

A transformer consists of two separate coils (primary and secondary) that influence one another.

Solution:

  • An AC current in the primary coil generates an oscillating magnetic flux.


  • This flux penetrates the secondary coil, inducing an AC voltage. This cross-coil induction is exclusively termed Mutual induction.


Why other options are incorrect:

Self-induction applies to a single coil (like an inductor). Rectification (half or full wave) is the conversion of AC to DC, which is performed by diodes, not transformers.

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