Question:
Lenz's law is a consequence of conservation of:
Lenz's law is a consequence of conservation of:
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Lenz = Opposition. Without this opposition, we would have a "perpetual motion machine," which is impossible in physics.
Updated On: May 5, 2026
- Mass
- Charge
- Energy
- Momentum
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The Correct Option is C
Solution and Explanation
Step 1: Concept
Lenz's Law states that the direction of an induced electromotive force (emf) is such that it always opposes the change in magnetic flux that produced it.
Step 2: Meaning
This law provides the negative sign in Faraday's Law of Induction: $\epsilon = - \frac{d\Phi}{dt}$.
Step 3: Analysis
If the induced current did not oppose the change, it would create a positive feedback loop, generating energy out of nothing, which violates the First Law of Thermodynamics. The mechanical work done to move a magnet against the opposing force is converted into electrical energy.
Step 4: Conclusion
Because the electrical energy produced comes at the cost of external mechanical work, the law is a direct manifestation of the Law of Conservation of Energy. Final Answer: (C)
Lenz's Law states that the direction of an induced electromotive force (emf) is such that it always opposes the change in magnetic flux that produced it.
Step 2: Meaning
This law provides the negative sign in Faraday's Law of Induction: $\epsilon = - \frac{d\Phi}{dt}$.
Step 3: Analysis
If the induced current did not oppose the change, it would create a positive feedback loop, generating energy out of nothing, which violates the First Law of Thermodynamics. The mechanical work done to move a magnet against the opposing force is converted into electrical energy.
Step 4: Conclusion
Because the electrical energy produced comes at the cost of external mechanical work, the law is a direct manifestation of the Law of Conservation of Energy. Final Answer: (C)
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