Math, asked by Prashanttiwari7355, 1 year ago

What is the working principle of ac generator?

Answers

Answered by kiran1115
2
alternators (as they are usually called) operate on the same fundamental principles of electromagnetic induction as D.C.generator Alternating voltage may be generated by rotating a coil in the magnetic field or by rotating a magnetic field within a stationary coil.
Answered by fanbruhh
4

Step-by-step explanation:

\huge \bf{ \red{answer}}

\bf{\: principal}

It is based on the principle of electromagnetic induction . when a coil is rotated about an axis perpendicular to the direction of uniform magnetic field, an indused emf produced across it.

\bf{construction}

The AC generator consists of the following parts :

\sf{1. \: armature}

A rectangular coil ABCD consisting of a large number of turns wound over a soft iron core is called armature. the soft iron core is used to increase the magnetic flux.

\sf{2. \: field \: magnet}

it is a strong magnet having concave poles. the armature is rotated between the two poles of this magnet so that axis of armature is perpendicular to magnetic field lines. in a small AC generator the magnet is the permanent magnet but in Big AC generators it is an electromagnet.

\sf{3. \: slip \: rings}

the leads from the arms of armature AC connected to two slip rings S, which rotate with the loop .

\sf{4. \: brushes}

the rings slide against stationery contacts called brushes . these brushes are made up of carbon. these brushes are connected to the output terminals p and q.

\bf{working}

the working of AC generator can be understood with the help of various positions of the armature .

suppose at time 't' =0 , the plane of the loop is perpendicular to B . as the loop rotate from position t=0 to position t=T/2 , induced EMF changes from zero to maximum value and then becomes zero again, hence induced EMF is zero. as the loop moves from position t =T /2 to position t=T , the EMF again changes from zero to maximum value and then again becomes zero .

Thus the output of the AC generator varries sinusoidally with time . The induced EMF does not depend upon the shape of the loop but depends only upon area of the loop..

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