What Is The Difference Between

EMI And EMF

EMI stands for electromagnetic induction. A change in magnetic flux (or number of lines of force = φ) through a metal surface or a circuit induces an emf in it and this phenomenon is called electromagnetic induction.

EMF stands for electromotive force. EMF is the potential difference across the two terminals of a voltage source when it is not connected to any circuit. Once it is connected to a circuit, the voltage reduces slightly because of the internal resistance of the voltage source.