Lenz's Law
Easyphysics
Lenz's law gives direction of induced current such that it?
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Solution
Incorrect! Answer:
Opposes flux change
- Lenz's Law Statement: The direction of an induced current is such that it creates a magnetic field that opposes the change in magnetic flux that produced it.
- Formula: ϵ=−dtdΦ (The negative sign represents Lenz's Law).
- Physical Basis: This law is a consequence of the Law of Conservation of Energy. If it enhanced the change, energy would be created from nothing, leading to an infinite current loop.
- Application: Moving a magnet toward a coil induces a current that creates a repelling magnetic pole.
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About This Question
- Subject
- physics
- Chapter
- em induction and ac
- Topic
- lenz's law
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Opposes flux change
- Lenz's Law Statement: The direction of an induced current is such that it creates a magnetic field that opposes the change in magnetic flux that produced it.
- Formula: ϵ=−dtdΦ (The negative sign represents Lenz's Law).
- Physical Basis: This law is a consequence of the Law of Conservation of Energy. If it enhanced the change, energy would be created from nothing, leading to an infinite current loop.
- Application: Moving a magnet toward a coil induces a current that creates a repelling magnetic pole.
This easy difficulty physics question is from the chapter em induction and ac, covering the topic of lenz's law. It appeared in the 2025 exam.
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