Electrical Machines
If the temperature of armature resistance is increased, the speed of a series motor would

 increase.
 decrease.
 None of above.
 not change.

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Electrical Machines
A 3-φ alternator has negligible stator resistance. A short circuit test is conducted on this alternator. At a particular speed, a field current of If1 is required to drive the rated armature current. If the speed of the alternator is reduced to half, the field current required to maintain rated armature current

  Cannot be predicted due to insufficient data.
 Would be equal to If1.
 Would be equal to If1/2.
 Woud be equal to 2If1.

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