Physics Electromagnetic Induction DUHS 2023
PMDC Verified Question 29 of 69
On which principle does the transformer work?
A
Self-induction
B
Mutual induction
C
Motional emf
D
Magnetic torque
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Mutual induction
Concept:

The operation of a transformer depends fundamentally on interactions between multiple magnetically linked coils.

Solution:

  • The changing AC current in the primary coil induces a voltage in the secondary coil. This transfer of energy across separate coils is defined as Mutual induction.


Why other options are incorrect:

Self-induction occurs within a single isolated coil. Motional EMF requires moving parts (generators). Magnetic torque drives electric motors.

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