Physics
Name and state the principle of a simple a.c. generator. What is it's use?
Electro-Magnetism
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Answer
An A.C. generator is a device which converts the mechanical energy into the electrical energy using the principle of electromagnetic induction.
Principle — In a generator, a coil is rotated in a magnetic field. Due to rotation, the magnetic flux linked with the coil changes and therefore an e.m.f. is induced between the ends of the coil. Thus, a generator acts as a source of current in an external circuit containing load when connected between the ends of it's coil.
Use — We use a.c. generator in our house as an alternative source of electricity when electric supply from mains is not available.
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