CBSE Class 12-science Answered
State the principle of an ac generator. Write an expression for the maximum emf produced in it ?
Asked by Topperlearning User | 07 Jul, 2015, 02:19: PM
Expert Answer
The working of A.C generator is based on phenomenon of electromagnetic induction. When a closed coil is rotated rapidly in a uniform magnetic field, the magnetic flux linked with the coil changes continuously which results in setting an induced emf in the coil. This induced emf causes a current to flow in the coil.
Induced emf,
E = NBA sinωt
Emax = NBA (when sinωt = 1)
N = number of turns of coil
= angular speed of rotation
B = strength of magnetic field
A = area of coil
Answered by | 07 Jul, 2015, 04:19: PM
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