Electrical Machines
A 4 pole dynamo with wave wound armature has 51 slots contains 20 conductors in each slot. If induced emf 357 Volts and speed is 8500 rpm, flux per pole will be

 2.7 mWb.
 1.4 mWb.
  1.2 mWb.
 3.5 mWb.

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Electrical Machines
No load primary current in a transformer

 lags behind applied voltage somewhat less than 90Ã
 leads the applied voltage by exactly 90Â&
 leads the applied voltage somewhat less than 90Ã&
 lags behind applied voltage by exactly 90Â&am

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