AC GENERATOR IN 30 MINUTES CLEAR ANS CONCISE CONCEPT FOR CLASS 12 NCERT STUDENTS

Описание: Alternating current is a device that converts mechanical energy into electrical energy.
Principle It is based on the principle that an induced emf is produced when a current or magnetic flux linked with the changes
Construction
Permanent magnet :Two strong cocave pole permanent magnet
Armature :The rectangular loop ABCD places in the magnetic field
Slip rings : These rings are attached with armature and provide movable contact while rotating the loop.
Carbon Brushes:These two brush are provide alternating current through the two wires.
Working : One method to produce an induced emf in a loop is through changing the loop's orientation or effective area Acos©
© Is the angle between A area and B magnetic field
E=-D¢/Dt
E=-D(BAcos©)/Dt
E=-BAsin©D©/Dt
E=-BAwsinc(2πvt)
Alternating emf (current) changes direction magnitude periodically in a sine function.


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