How do electric generators work?

The operation of  electric generators  is based on the phenomenon of electromagnetic induction: when a conductor makes a relative movement towards a magnetic field, the voltage is induced in the conductor. Particularly, if a magnet is rotating in a coil, AC voltage (alternating current) is induced within the coil. For more information, see the  guide  that explains how electric generators work with an image that illustrates their main operation.

The induced voltage (called electromotive force emf) creates a current through an external circuit connected to the turbine, producing power that is transferred to the load. Therefore, the kinetic energy that rotates in the source of the magnetic field is converted into electricity. The  current flowing through the external load  creates, in turn, a magnetic field that opposes the change in flux in the coil, thus the coil opposes movement. The higher the current, the greater the force that will have to be applied to the magnet to keep it from slowing down.

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