Electrical Machines
The current drawn by the armature of DC motor is directly proportional to

 None of above.
 The speed of motor.
 The voltage across the terminals.
 The torque required.

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

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Electrical Machines
In a DC shunt generator working on load, the brushes are moved forward in the direction of rotation, as a result of this, commutation will

 improve but terminal voltage will fall.
  improve and terminal voltage will rise .
  worsen and terminal voltage will rise.
  worsen and terminal voltage will fall

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