Question

state the principle of an electric generator and electric motor... ​

Answer 1

The opposite is done by generators that convert mechanical work to electrical energy. Principle of Generators: When a conductor moves in a magnetic field, an emf is induced across the conductor. This is the only basis on which each and every rotating electric generator works.

Answer 2

principle electric motor is Flemings left hand rule

electric generator- Flem OK NGOs right hand rule