Question

Can somebody please explain to me what E.M.F is?
Don't copy from websites....I need a clear explanation in about 20-40 Words...

Answer 1

emf(electromotive force) id basically the voltage developed in a circuit(electric potential).there can be two ways to produce an emf(electric potential or voltage):-1.when a flux is created that is when a bar magnet is moved towards or away from a solenoid,current is generated in the circuit,which means that voltage is also developed.so in this method,emf is produced by the motion of the magnet.
2.when current is passed in a circuit,and another circuit is kept near it in which there is no current flowing,then magnetic field is generated around the circuit in which current is passed and it changes the magnetic field of the current carrying conductor(solenoid) in the second circuit.this change results in the formation of current in the other circuit and thus and emf is produced