RIght hand rule

Asked by csmadhav | 6th Nov, 2009, 09:29: PM

Expert Answer:

If a machine is constructed to rotate a magnetic field around a set of stationary wire coils with the turning of a shaft, AC voltage will be produced across the wire coils as that shaft is rotated, in accordance with Faraday's Law of electromagnetic induction. This is the basic operating principle of an AC generator, also known as an alternator:


The polarity of the voltage across the wire coils reverses as the opposite poles of the rotating magnet pass by. Connected to a load, this reversing voltage polarity will create a reversing current direction in the circuit. The faster the alternator's shaft is turned, the faster the magnet will spin, resulting in an alternating voltage and current that switches directions more often in a given amount of time.

The direction of induced this alternating voltage or induced current produced by AC generator can be determined using Fleming's right hand rule.

Answered by  | 6th Nov, 2009, 11:37: PM

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