Physics A-Level
Lenz's law
What Lenz's law means in Physics A-Level, as defined for AQA, OCR.
Definitions of Lenz's law
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Reference: AQA
The induced current flows in a direction that opposes the change in flux linkage that produced it.
The induced e.m.f. drives a current whose magnetic effect opposes the change producing it.
Topics that use Lenz's law
- Electromagnetic induction (A-level only) (AQA A-Level)
- Electromagnetism (OCR A-Level)
Related terms
- Faraday's law
- Angular frequency
- Changing flux linkage
- Flux linkage
- Lenz's law and opposition to change
- Magnetic flux
- Practical observation of induced e.m.f. and current
- Rate of change of flux linkage
Using Lenz's law in the exam
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