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Electrical Machines

Electrical Machines
Stepper motor is used in

 computer printers
 traction
 food processing
All of these

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Electrical Machines
For a practical synchronous motor the pull out torque will occur when the torque angle is nearly equal to

 0°.
 30°.
  75°.
 45°.

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Electrical Machines
Voltage regulation of transformer is given by

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

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Electrical Machines
The armature shaft must be able to withstand

All of these
 any unbalanced magnetic pull on the armature core.
 bending moment due to weight of the armature.
 twisting strains due to transmission of torque.

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Electrical Machines
Magnetic field of a DC generator is produced by what?

 Both B and C.
 Permanent magnets.
  Electromagnets.
 None of the options.

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

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

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MORE MCQ ON Electrical Machines

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