PMDC Verified Question 8 of 69
The basic principle behind the operation of the transformer is:
A
Coulomb's law
B
Electromagnetic induction
C
Gas's law
D
Hess's law
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Electromagnetic induction
Concept:

A transformer transfers electrical power between two isolated coils without any physical electrical connection.

Solution:

  • It does this by passing alternating current through the primary coil to generate a changing magnetic field.


  • This changing field cuts through the secondary coil, inducing a voltage. This overarching process is a prime example of Electromagnetic induction (specifically, mutual induction).


Why other options are incorrect:

Coulomb's law governs static point charges. Gas laws govern thermodynamics of vapors. Hess's law governs chemical enthalpy changes. None apply to transformers.

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