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Electrical Machines

Electrical Machines
The wattage rating of a ceiling fan motor will be

 200 - 250 W.
 250 - 500 W.
  50 - 150 W.
 10 - 20 W.

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

 Starting torque.
 Running Torque.
 Speed regulation.
  Effiency.

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Electrical Machines
It is an advisable to use auto transformer if the transformation ratio is

 near to 1.
 Greater than 1.
 0.5.
 0.25.

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Electrical Machines
A Shunt generator running at 1000 rpm has generated emf of 100 V. If the speed increases to 1200 rpm, the generated emf will be nearly

 240 V
 175 V
 120 V
 140 V

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Electrical Machines
In DC machine torque depends on which of the following?

 both A and B
 flux (φ)
 armature current (I)
 speed

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Electrical Machines
Lamination of core are generally made of

 stainless steel.
 silicon steel.
 carbon.
 cast iron.

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MORE MCQ ON Electrical Machines

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