Question

Principal , structure,and working of A C generator ......

its urgent. ....

Answer 1

Principle − Based on the phenomenon of electromagnetic induction


Main parts of an ac generator:

Armature − Rectangular coil ABCD

Filed Magnets − Two pole pieces of a strong electromagnet

Slip Rings − The ends of coil ABCD are connected to two hollow metallic rings R1 and R2.

Brushes − B1 and B2 are two flexible metal plates or carbon rods. They are fixed and are kept in tight contact with R1 and R2respectively.

Theory and Working − As the armature coil is rotated in the magnetic field, angle θ between the field and normal to the coil changes continuously. Therefore, magnetic flux linked with the coil changes. An emf is induced in the coil. According to Fleming’s right hand rule, current induced in AB is from A to B and it is from C to D in CD. In the external circuit, current flows from B2 to B1.

Answer 2

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