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

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

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Electrical Machines
In a synchronous motor when the rotor speed exceeds the synchronous speed during hunting

  the damper bars develop induction generator torque.
  the damper bars develop synchronous motor torque.
  the damper bars develop induction motor torque.
  negative sequence currents are generated.

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Electrical Machines
In an alternator, voltage drops occurs in

  armature resistance, leakage reactance and armature reaction.
  armature resistance, leakage reactance, armature reaction and earth connection.
  armature resistance only.
  armature resistance and leakage reactance.

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