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Electrical Machines

Electrical Machines
In a DC Shunt Motor if the load current increases then field flux

 decreases.
 increases.
 remains constant.
 decreases

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Electrical Machines
A DC series motor is running at rated speed without any additional resistance in series. If an additional resistance is placedin series, the speed of motor

  Decreases.
 Increases.
 Oscillates around the rated speed.
 Remains unchanged.

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Electrical Machines
Stability of a synchronous motor ---------- with the increase in excitation.

 decreases
 remains unaffected
 increases
 any of the above

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Electrical Machines
Which of the DC Motor use flywheel?

 Shunt motor.
 Series motor.
 Differently compared motor.
 Cumulatively compound motor.

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Electrical Machines
Dynamic braking is employed to brake

None of these
 non reversing drive
 reversing drive
 both 1 and 2

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Electrical Machines
Iron loss in a transformer mainly occurs in

 steel core in transformer.
 transformer insulating oil.
 winding of transformer.
 iron made tank of transformer.

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