WHAT IS THE DIFFERENCE BETWEEN AN AC GENERATOR AND A DC GENERATOR?
Asked by | 12th Jun, 2008, 05:47: PM
Principle : DC generator
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.
Hence, the basic essential parts of an electric generator are :
A magnetic field and
A conductor or conductors which can so move as to cut the flux.
Principle : A.C. generators or alternators (as they are usually called) operate on the same fundamental principles of electromagnetic induction as D.C. generators.
Alternating voltage may be generated by rotating a coil in the magnetic field or by rotating a magnetic field within a stationary coil. The value of the voltage generated depends on-
1.) the number of turns in the coil.
2.) strength of the field.
3.) the speed at which the coil or magnetic field rotates.
Answered by | 12th Jun, 2008, 07:41: PM
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