Question

How is energy transferred in an electric generator

Answer 1

in electrical generator, coil is moved under the magnetic field and it will produce the current

Answer 2

generator CONVERTS energy from one form to another and it often uses several conversions.
coal fired generator is probably the most common.

Coal stores chemical energy that originates mostly from the sun. Coal is made of things that lived thousands of years ago (mostly plants) that lived, died, rotted and were covered by more plants that lived, died and rotted. Eventually, under a lot of pressure from other dead plants lying on top of them, plants slowly turn into coal. In this transformation, coal keeps the energy it stores from its life in the sun. We end up burning some of the earth's coal, which releases chemical energy and converts to thermal energy (heat). The thermal energy boils water into steam. Steam turns into mechanical energy that we use to turn turbines. Turbines spin magnets through coils of wire and force electrons to move. When the electrons in the wire moves we can then call this electrical energy.
Is that your answer?
May be no I guess.