An engine delivering 250 B.H.P drives a dynamo ,which generates 890 amperes at a pressure of 200 volts. Then the efficiency of the dynamo is %
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Explanation:
Standard bike dynamos produce 3 watt 6 volts. That's not a lot of power but 12 hours of cycling should charge a 36 watt hour battery.
The generator/dynamo is made up of stationary magnets (stator) which create a powerful magnetic field, and a rotating magnet (rotor) which distorts and cuts through the magnetic lines of flux of the stator. When the rotor cuts through lines of magnetic flux it makes electricity.
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