Electromagnetic Induction and Faraday’s Law. Induced EMF. Induced EMF is produced by a changing of magnetic field. Induced EMF is proportional to the rate of change of the magnetic flux, F B. Units of Magnetic Flux. 1 weber (1 Wb) = 1 T m 2. Faraday’s Law of Induction.
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Induced EMF is proportional to the rate of change of the magnetic flux, FB
1 weber (1 Wb) = 1 T m2
If the flux through N loops of wire changes by the amount of DFB during time Dt, the average induced emf during this time is:
An induced emf always creates a current whose magnetic field opposes the original change in flux.