Faraday stated these experimental observations in the form of a Law, called ‘Faraday’s Law of Electricmagnetic Induction’.
The law is stated as follows:
“The magnitude of the induced emf, in a circuit, is equal to the time rate of change of the magnetic flx linked with the circuit.” Mathematically, the magnitude of induced emf is given by
For a closely wound coil of N turns, the total induced emf is given by
where ΦB = (Average) magnetic flux lined with ‘one turn’.
The product (NϕB) is called the ‘number of magnetic flux linages’ in the coil. Its unit is ‘weber-turns’.
