Physics A-Level
Motional emf
What Motional emf means in Physics A-Level, as defined for AQA.
Definition of Motional emf
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Reference: AQA
For a straight conductor of length L moving at speed v perpendicular to a uniform field B, the induced emf is ε = BLv.
Topics that use Motional emf
- Electromagnetic induction (A-level only) (AQA A-Level)
Related terms
- Angular frequency
- Changing flux linkage
- Faraday's law
- Flux linkage
- Lenz's law
- Lenz's law and opposition to change
- Practical observation of induced e.m.f. and current
- Rate of change of flux linkage
Using Motional emf in the exam
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