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Electrical Machines

Electrical Machines
If a DC Series motor is connected across an AC supply it will

 run at normal speed.
 not run.
 burn.
 run at lower speed.

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Electrical Machines
For a standard frequency the machine operates at a particular speed known as

 any of the above.
 normal speed.
 synchronous speed.
 slip speed.

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Electrical Machines
A shaded pole single phase induction motor can be used for

 personal computers as cooling fan
 tape recorders
 wet grinders
 food mixers

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Electrical Machines
Eb/Vt ratio of a DC motor is an indication of

 speed regulation.
 running torque.
 efficiency.
 starting torque.

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Electrical Machines
Consider a separately excited DC motor. If the field current is increased while the armature terminal voltage is held constant, then speed of the motor will

 increase.
 Decrease.d
 none of these.
 remains same.

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Electrical Machines
Synchronous condensers are used to

 improve starting torque
 improve the power factor
All of these
 reduce hunting

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MORE MCQ ON Electrical Machines

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