MCQ
Lenz's law is a direct consequence of:
- AThe law of conservation of momentum.
- BThe law of conservation of charge.
- ✓The law of conservation of energy.
- DThe law of conservation of emf.
✓
Answer
Correct option: C.
The law of conservation of energy.
Lenz's law states that the current induced in a circuit due to a change or a motion in a magnetic field is so directed as to oppose the change in flux.
We know that induced EMF produces a current that opposes the change in flux, because a change in flux means a change in energy.Energy can enter or leave, but not instantaneously. So, Lenz' law is a consequence of the law of conservation of energy.
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