Draw a labelled diagram of an a.c. generator. Explain briefly its principle and working.
CBSE DELHI - SET 1 2007
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Principle: It works on the principle of Faraday's low of electromagnetic induction. Whenever a coil is rotated in a uniform magnetic field about an axis perpendicular to the field, the magnetic flux linked with coil changes and an induced emf is set up across its ends.
The essential parts of an ac generator are shown in the figure. Initially, the armature coil ABCD is horizontal. As the coil is rotated clockwise, the arm AB movec up and CD moves down.
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