Electromagnetic Induction. A changing magnetic field generates a current. Faraday’s Induction Law. Emf electromotive force Induced emf ( ε ) voltage Induced emf is proportional to the area of the loop penetrated perpendicularly by the field.
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ε = -ΔΦ/Δt
ε measured in V
ε = -N (ΔΦ/Δt)
FM = qvB sinϴ = qvB
That force does work on the charge, acting parallel to the wires length (L)
ε = vBL