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Electrical Machines

Electrical Machines
Example of double excited machine is

 Both are correct.
 Synchronous motor.
None of these
 DC Shunt Motor

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Electrical Machines
In a single phase transformer the magnitude of leakage reactance is twice that of resistance of both primary and secondary. With secondary short circuited, the input power factor is

 2/√5
 1/√5
 1/√2
 1/3

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Electrical Machines
Armature resistance control method is also called as-----------?

 constant current control
 constant torque control
 constant voltage control
 constant power control

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Electrical Machines
The inertia constant H of a synchronous condenser is

  none of these.
 equal to that of the effective length of the line.
 greater than that of hydro generator.
 greater than that of turbo alternator.

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Electrical Machines
For a dc machine shunt resistance and armature resistance values are

 high and high
 low and high
 high and low
 low and low

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Electrical Machines
The flux is maximum in the following part of a DC motor:

 under the interpole.
 under leading pole tip.
 pole core.
 under trailing pole tip.

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MORE MCQ ON Electrical Machines

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