what is the principle of dc generators?

Answer Posted / prakash.p

generators convert mechanical energy to electrical energy

It is based on the principle of production of dynamically
(or motionally) induced e.m.f (Electromotive Force).
Whenever a conductor cuts magnetic flux, dynamically induced
e.m.f. is produced in it according to Faraday's Laws of
Electromagnetic Induction. This e.m.f. causes a current to
flow if the conductor circuit is closed.

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