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Electrical Machines

Electrical Machines
Induction motors have the advantage of

  less cost.
  all of below.
  simple in construction.
  less maintenance.

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Electrical Machines
The slip of an induction motor during DC rheostatic braking is

 2 + s.
  2 - s.
  s.
 1 - s.

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Electrical Machines
In which of the following DC Motor the ratio of starting torque to full load torque is minimum?

  Cumulative compound motor.
  Differential compound motor.
  Shunt motor.
  Series motor.

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Electrical Machines
For a DC machine having P no of pole pairs, Z no of conductors having length L of resistivity ρ and cross section S are arranged. what is the armature resistance for simple wave-winding ?

 PZL/4Sp²
 PZL/4S
 PZL/ 4Sa
 PZL/4Sa²

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Electrical Machines
In above question, find rms line voltage for delta connection?

 399 V.
  230.2 V.
 100 V.
 50 V.

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Electrical Machines
A 220 V DC machine has an armature resistance 1Ω. If the full load current is 20 A, the difference of induced voltage and generator is

 20 V.
  40 V.
 0 V.
 60 V.

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MORE MCQ ON Electrical Machines

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