Physics Electromagnetic Induction NUMS 2023
PMDC Verified Question 34 of 69
The Lenz's law is also statement of law of conservation of:
A
Charge
B
Mass
C
Energy
D
Pressure
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option C: Energy
Concept:

Lenz's law provides the physical intuition behind the negative sign in Faraday's law of induction.

Solution:

  • It states that an induced EMF always opposes the change generating it. This opposition requires mechanical work to be done to sustain motion.


  • This mechanical work is converted directly into electrical energy. Thus, Lenz's law is fundamentally a manifestation of the Conservation of Energy.


Why other options are incorrect:

Charge conservation relates to Kirchhoff's Current Law. Mass and pressure are completely unrelated to electromagnetic induction principles.

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