Question

How can electric energy be produced?

Answer 1

Motion of a conductor in a magnetic field produce electric energy.

Explanation:

In a dynamo or generator copper coils are rotated in a strong magnetic field.This produce electric current.
Actually generators are rotated by mechanical energy by turbines or engines.They convert mechanical energy in ti electric energy.
There are many other methods.
chemical batteries
solar energy sun light converted into electric energy.
most common method is generator driven by a turbine. or engine.
Picture Tutorvista.com\
Note Hydro ,power, thermal power, nuclear power, solar power, tidal ,power.wind power all these methods convert power into electrical energy.