Lenz's Law
Lenz's law ensures induced current direction opposes:
Select the correct option:
Solution
Change causing it
Lenz's Law provides the direction of the induced EMF: 'The direction of the induced EMF is such that it would tend to produce a current that opposes the change in magnetic flux that created it.'
- This is a consequence of the Law of Conservation of Energy.
- If the induced current supported the change, energy could be created out of nothing. The negative sign in Faraday's equation (E=−dΦ/dt) reflects this law.
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About This Question
- Subject
- physics
- Chapter
- electromagnetic induction and ac
- Topic
- lenz's law
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
Change causing it
Lenz's Law provides the direction of the induced EMF: 'The direction of the induced EMF is such that it would tend to produce a current that opposes the change in magnetic flux that created it.'
- This is a consequence of the Law of Conservation of Energy.
- If the induced current supported the change, energy could be created out of nothing. The negative sign in Faraday's equation (E=−dΦ/dt) reflects this law.
This easy difficulty physics question is from the chapter electromagnetic induction and ac, covering the topic of lenz's law. It appeared in the 2025 exam.
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