Physics Electromagnetic Induction NUMS 2022
PMDC Verified Question 54 of 69
Lenz's law is based on the law of conservation of:
A
Mass
B
Energy
C
Charges
D
Momentum
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Energy
Concept:

Lenz's Law ensures that electrical energy does not manifest from nowhere.

Solution:

  • The induced current flows in a direction that generates an opposing magnetic force.


  • Overcoming this opposing force requires mechanical work. This work is what is fundamentally converted into electrical energy, satisfying the law of Conservation of Energy.


Why other options are incorrect:

If Lenz's law were false, an induced magnetic field would attract the moving magnet, accelerating it endlessly. This would create infinite kinetic and electrical energy without doing work, violating thermodynamic laws.

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