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Electrical Machines

Electrical Machines
The 3 - Φ induction motor with rotor circuit open will

  not run.
  get over heated.
  make noise.
  run normally.

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Electrical Machines
A DC motor with armature resistance of 0.5 ohms is connected directly to a 230 Volt supply. If the armature is stationary then the current flowing through armature is

 460 A.
 250 A.
 340 A.
 570 A.

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Electrical Machines
The torque developed in IM is nearly proportional to

  V.
  V2.
  1 / V.
 1 / V2.

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Electrical Machines
A DC series motor drawing an armature current of Ia is operating under saturated magnetic conditions. The torque developed in the motor is proportional to

 1/Ia
 Ia
 I/Ia2
 Ia2

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Electrical Machines
Hopkinson test is conducted under which of the following condition?

 half load
 any of the above
 full load
 no load

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Electrical Machines
Eb/Vt ratio of a DC motor is an indication of

 speed regulation.
 running torque.
 starting torque.
 efficiency.

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MORE MCQ ON Electrical Machines

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