Physics Electromagnetic Induction SZABMU 2022
PMDC Verified Question 45 of 69
Lenz's law is also a statement of law of conservation of:
A
Charge
B
Energy
C
Momentum
D
Mass
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 states that the direction of an induced current will oppose the change in magnetic flux that produced it.

Solution:

  • This opposition creates a resistive magnetic force. Mechanical work must be actively done against this opposing force to keep the coil or magnet moving.


  • This mechanical work is converted into the electrical energy of the induced current, perfectly demonstrating the Conservation of Energy.


Why other options are incorrect:

If Lenz's law did not hold (i.e., if induced current aided the motion), the magnet would accelerate infinitely, creating limitless energy. Charge, momentum, and mass conservation govern different physical phenomena.

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.

Previous Question All Electromagnetic Induction MCQs Next Question

Want to solve full-length papers under timed exam conditions?

Practice with zero-scroll lockdown sprints, dynamic latency zone timers, live peer selection telemetry, and the automated Amber mistake recovery loop.

Enter Arena Sprint iOS App Android App