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CBSE - X - Physics

when split ring act as a commutator then why is it used in a dc generator ? how  does it not alternate current in dc generator
how does the slip ring alternates current in ac generator?

Asked by kanishkapanwar2424 7th September 2015, 6:05 PM
Answered by Expert


Hi Kanishka,
The function of split ring is to make the coil of the motor rotate in the same direction.
In an AC generator the coil itself rotates in opposite direction after every half rotation so that reverse current is obtained. If here a split ring is used then it will defeat the whole purpose of producing an AC current. It will start producing a DC current if split ring is used as the coil will rotate in reverse the split ring will make the direction of current reverse making it flow in the same direction giving rise to DC current.
So, a split ring or a commutator should not be used for AC generator. If you want a DC current then you can use it.

Answered by Expert 7th September 2015, 6:09 PM

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