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Electrical Machines

Electrical Machines
Stepper motor is used in

 traction
 food processing
All of these
 computer printers

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Electrical Machines
The shaft torque of a dc motor is less than the electromagnetic torque because of

  hysteresis losses.
  eddy current losses.
  ohmic losses.
  mechanical losses.

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Electrical Machines
When the mechanical power is developed by a DC motor maximum

 back emf is equal to applied voltage.
 Back emf is equal.
 None of above.
  Back emf is equal to half of applied voltage.

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Electrical Machines
Inter pole winding is connected in-------------------------- ?

 parallel with main poles
 series with main poles
 series with armature
 parallel with armature

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Electrical Machines
In a 6 pole DC machine, 90 mechanical degrees correspond to which of the following electrical degree?

 45.
 30.
  270.
 180.

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Electrical Machines
In a transformer, the frequency of a voltage at the secondary is

 less than primary.
 greater than the primary.
 any of the above.
 equal to primary.

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MORE MCQ ON Electrical Machines

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