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Electrical Machines

Electrical Machines
The principle of dynamically induced emf is utilized in

 generator.
 transformer.
 thermocouple.
 choke.

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Electrical Machines
Two DC series motors are connected in series and are driving the same mechanical load. If the motors are now connected in parallel the speed will become

 one fourth.
 half.
 double.
 4 times.

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Electrical Machines
In DC machine shape of main field flux distribution is?

 peaky in nature
 flat tapped or trapezoidal
 triangular
 saddle shape

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Electrical Machines
stepped cores are used in transformers in order to reduce

 reluctance of core.
 volume of copper.
 volume of iron.
 iron loss.

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Electrical Machines
The current drawn by a 220 V DC series motor of armature resistance 0.5Ω and back back emf 200 V is

 44 A.
  40 A.
 400 A.
 440 A.

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

  Effiency.
 Running Torque.
 Starting torque.
 Speed regulation.

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MORE MCQ ON Electrical Machines

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