𧲠10. Magnetism
π Theory β 𧲠10. Magnetism
Magnetic fields are regions where magnetic forces act.
Force on a current-carrying wire: F = BIl sinΞΈ.
Force on a moving charge: F = Bqv sinΞΈ.
Magnetic flux density B is the strength of a magnetic field.
Electromagnetic induction: an emf is induced when magnetic flux changes.
Faraday's law: induced emf = -NΞΞ¦/Ξt.
Lenz's law: the direction of induced current opposes the change that produced it.
Transformers: V_s/V_p = N_s/N_p.
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