1. Electromagnetic Induction and Faraday’s Law.

2. Induced EMF

3. Induced EMF is produced by a changing of magnetic field.

4. Induced EMF is proportional to the rate of change of the magnetic flux, FB

5. Units of Magnetic Flux
1 weber (1 Wb) = 1 T m2

6. Faraday’s Law of Induction
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:

7. Lenz’s Law
An induced emf always creates a current whose magnetic field opposes the original change in flux.

8. Different Examples