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Electrical Machines

Electrical Machines
Hysteresis loss will depends on

 f
 f³
 f1.6
 f²

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Electrical Machines
A series motor is efficiently suitable for

  high starting torque operation.
 none of these.
 low starting torque operation.
 constant speed operation.

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Electrical Machines
The maximum power developed in cylindrical synchronous machine is occurs at a load angle of

 0o.
 Greater than 90o.
 less than 90o.
 90o.

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Electrical Machines
The short circuit test on a transformer is conducted to obtain

  copper losses.
 eddy current loss.
 core loses only.
 hysteresis loss.

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Electrical Machines
What is the speed of stator rotating magnetic field with respect to rotor rotating magnetic field?

 Slip speed
 Zero
 Synchronous speed
None of these

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Electrical Machines
In V/f speed control of 3-phase induction motor, with increase in frequency, the slip at which maximum torque occurs

None of these
 decrease.
 either of these.
 increase.

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MORE MCQ ON Electrical Machines

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