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Electrical Machines

Electrical Machines
A DC generator without commutator is a

 DC motor
 induction motor
 DC generator
 AC generator

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Electrical Machines
Stability of a synchronous motor ---------- with the increase in excitation.

 remains unaffected
 increases
 decreases
 any of the above

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Electrical Machines
A crusher is equipped with

 Reluctance motor.
 Slip ring induction motor.
 Synchronous motor.
 DC shunt motor.

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Electrical Machines
In speed control of DC shunt motor by varying field flux, what may be the value of field regulator?

 10 ohm
 100 ohm
 0.2 ohm
 2 ohm.

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Electrical Machines
What is the phase difference between two windings of A.C servomotor ?

 90°.
 120°.
 60°.
 30°.

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Electrical Machines
The direction of rotation of a DC motor can be determent by

  Flemings left hand rule.
 Amperes law.
 Flemings right hand rule.
 Lenzs law.

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MORE MCQ ON Electrical Machines

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