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Electrical Machines

Electrical Machines
Open circuit test on transformer gives

 hysteresis loss
 eddy current loss
 copper loss
 both 1and 2

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Electrical Machines
What type of connection is made in between the inter-pole and the field winding?

 Parallel.
  Series.
 Compound.
 None of the options.

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Electrical Machines
In a DC generator, if P be the number of poles and N be the rpm of the rotor, then frequency of magnetic reversals will be

 PN/2.
 PN/3000.
 PN/60.
 PN/120.

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Electrical Machines
Slip test is performed to determine

 slip
 direct axis reactance and quadrature axis reactance
 positive sequence reactance and negative sequence reactance
All of these

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Electrical Machines
In dc machines, the armature windings are placed on the rotor because of the necessity for

 generation of voltage
 electromechanical energy conversion
 commutation
 development of torque

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Electrical Machines
For the same power output rating and full load speed, the motor will have poorest starting torque, is

  Shunt.
 Series.
 Cummulative compound.
 Differential compound.

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MORE MCQ ON Electrical Machines

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