Electrical Machines
A 3 stack stepper motor has 12 teeth on stator as well as on rotor. Determine the step size when each stack excited?

 30°.
 45°.
 24°.
  10°.

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Electrical Machines
No load primary current in a transformer

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

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