Physics A-Level
Lenz's law and the negative sign
What Lenz's law and the negative sign means in Physics A-Level, as defined for OCR.
Definition of Lenz's law and the negative sign
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Read the wording for your board, then hide it and explain Lenz's law and the negative sign in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: OCR
The negative sign represents Lenz's law: the induced e.m.f. opposes the change in flux linkage.
Topics that use Lenz's law and the negative sign
- Electromagnetism (OCR A-Level)
Related terms
- Faraday's law
- Lenz's law
- Magnetic flux
- Transformer action and turns ratio
- Weber
- Angle between field and normal
- Energy losses and laminated cores
- Factors that change flux linkage
Using Lenz's law and the negative sign in the exam
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