Electrical Machines
Wave winding is prefered for which of the following rating?

 low current and high voltage
 high current and low voltage
 high current and high voltage
 low current and low voltage

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Electrical Machines
What will happen if the the supply terminals are reversed in case of a DC shunt motor?

 The motor will run in reverse direction.
 The motor will run at its normal speed in the same direction as before.
 The motor will stop.
 The motor will run much faster in the same direction.

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Electrical Machines
In a DC machine the armature mmf is

  stationary with respect to armature.
 rotating with respect to field poles.
  stationary with respect to field poles.
  rotating with respect to field poles as well as armature.

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