Physics Ontology

One map of physics, three ways in. Drill down on any quantity to see its units, the equations it lives in, and how its values span the universe.

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Φ\Phi
Electromagnetism

Magnetic Flux

Total magnetic field passing through a surface.

SI unit

weber (Wb)

Dimension: [ ML2T−2I−1 ][\,M L^2 T^{-2} I^{-1}\,]

Other units

  • weber (Wb)

Order of magnitude

How values of magnetic flux span the physical world (in Wb, log scale).

Flux quantum
2.07 × 10-15 Wb
Small coil
10-4 Wb
Large transformer
100 Wb
Lower limit10-15 WbUpper limit102 Wb

Appears in 2 equations

Faraday's Law of Induction
ε=−dΦdt\varepsilon = -\dfrac{d\Phi}{dt}
Magnetic Flux
Φ=BAcos⁡θ\Phi = B A \cos\theta

Associated scientists

Michael FaradayJames Clerk Maxwell