Electrical Machines
Which of the following motor is used in grinders?

  Synchronous motor.
  Split phase IM.
  Capacitor start IM.
  Capacitor start capacitor run IM.

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Electrical Machines
The 3 - Φ induction motors are, by a very considerable margin, the most widely used AC motors as

  they have very good speed regulation.
  they are capable of operation under range of leading and lagging pf.
  they have maximum efficiency and maximum starting torque.
  these are cheaper in cost, simple and rugged in construction.

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Electrical Machines
No load primary current in a transformer

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

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