Physics Electromagnetic Induction UHS 2024
PMDC Verified Question 9 of 69
Electric generators and transformers are based on the principles of:
A
Coulomb's law
B
Faraday's law
C
Ampere's law
D
Hook'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: Faraday's law
Concept:

Both generators and transformers rely on a changing magnetic environment to generate an electromotive force (EMF).

Solution:

  • A generator uses a physically rotating coil in a static magnetic field.


  • A transformer uses a static coil in a changing AC magnetic field.


  • Both devices fundamentally operate because a changing magnetic flux induces an EMF, which is the core statement of Faraday's law of electromagnetic induction.


Why other options are incorrect:

Ampere's law describes how current creates a magnetic field, but Faraday's law describes how changing magnetic fields create voltage (which is what generators and transformers do). Hooke's law is for mechanical springs.

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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