Physics Electromagnetic Induction KU 2024
PMDC Verified Question 7 of 69
Lenz's law is consistent with the
A
Ampere's law
B
Faraday's law
C
Law of conservation of energy
D
Ohm'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 C: Law of conservation of energy
Concept:

Lenz's law dictates that the induced magnetic field opposes the motion or change creating it.

Solution:

  • Because it opposes the motion, external mechanical work is required to push through this "magnetic friction."


  • This mechanical work is converted directly into electrical energy. Thus, Lenz's law prevents energy from being created out of nothing, making it consistent with the Law of conservation of energy.


Why other options are incorrect:

If Lenz's law were not true (if the field aided motion), a magnet would accelerate endlessly on its own, violating the first law of thermodynamics (energy conservation).

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