Question

Name the device which converts mechanical energy into electrical energy. Explain the principle on which it works

Answer 1

It is called Generator.
Working principle of a DC generator: According to Faraday's laws of electromagnetic induction, whenever a conductor is placed in a varying magnetic field (OR a conductor is moved in a magnetic field), an emf (electromotive force) gets induced in the conductor.

Answer 2

Electric Generator converts mechanical energy into electrical energy . 

Principle :-
The electric generator works on the principle that when a straight conductor is moved in a magnetic field , then current is induced in the conductor .