Physics Electromagnetic Induction SZABMU 2023
PMDC Verified Question 24 of 69
The phenomenon in which a changing current in one coil induces an emf in another coil is:
A
Self-induction
B
Mutual induction
C
Eddy current
D
Choke
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Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Mutual induction
Concept:

Electromagnetic induction can occur between physically separated but magnetically linked circuits.

Solution:

  • When current changes in a primary coil, it alters the surrounding magnetic field.


  • This expanding/collapsing field sweeps across a neighboring secondary coil, inducing voltage. The "mutual" sharing of this flux between two distinct coils is defined as Mutual induction.


Why other options are incorrect:

Self-induction happens within the same single coil. Eddy currents are wasteful circular currents induced in solid metal cores. A choke is an inductor designed to utilize self-induction to block high-frequency AC.

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