Physics A-Level
Flux linkage
What Flux linkage means in Physics A-Level, as defined for AQA.
Definitions of Flux linkage
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Reference: AQA
For a coil of N turns, NΦ, derived as NΦ = BANcosθ, identifying B, A, N and θ with correct units: T, m², dimensionless and degrees or radians.
The product of the number of turns N and the magnetic flux Φ through each turn, where N is the number of turns cutting the flux.
NΦ, where Φ = BA cos θ for a uniform field through a flat coil, so changing B, A or the angle θ changes the linkage.
Through the coil it is NΦ = BAN cos ωt, varying as the cosine of the angle between the field and the normal.
Topics that use Flux linkage
- Electromagnetic induction (A-level only) (AQA A-Level)
- Magnetic flux and flux linkage (A-level only) (AQA A-Level)
Related terms
- Angular frequency
- Changing flux linkage
- Cosine variation with angle
- Faraday's law
- Lenz's law
- Lenz's law and opposition to change
- Magnetic flux
- Practical observation of induced e.m.f. and current
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