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Electrical Machines

Electrical Machines
Eddy current loss will depends on

 Flux density
 Thickness
 Frequency
All of these

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Electrical Machines
Current in a coil undergoing commutation is not able to get reversed completely by the end of commutation period. It is due to

None of these
 armature emf.
  coil resistance.
  reactance voltage induced in the coil.

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Electrical Machines
Mechanical energy is supplied to DC generator at the rate of 4200 J / s. The generator delivers 32.2 Amp at 120 V. What is the percentage efficiency of the generator?

 210 V.
 212 V.
 205 V.
  201.02 V.

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Electrical Machines
In Ward-Leonard method of speed control, the direction of rotation of motor is reversed usually reversing the connection of the

 motor armature terminal.
 motor field terminal.
 generator field terminal.
 generator armature terminal.

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Electrical Machines
Voltage regulation of transformer is given by

 (E2 - V2) / V2
 (V2 - E2) / E2
 (E2 - V2) / E2
 (V2 - E2) / V2

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

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

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MORE MCQ ON Electrical Machines

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