Home › UP Board Class 12 › Magnetism & EMI › Lenz's law is a direct consequence of:
Lenz's law is a direct consequence of:
AConservation of energy
BConservation of charge
CConservation of magnetic flux
DConservation of momentum
Answer & Solution
Correct answer: A. Conservation of energy
If the induced current did not oppose the change in flux, the system would gain energy without any external work being done, creating a perpetual-motion situation. The negative sign in $\varepsilon = -d\Phi/dt$ enforces conservation of energy by ensuring that work has to be done against the induced effects.
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