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Electrical Machines

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

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

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Electrical Machines
In a 2 pole lap winding dc machine , the resistance of one conductor is 2Ω and total number of conductors is 100. Find the total resistance

 200Ω
 10Ω
 50Ω
 100Ω

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Electrical Machines
DC shunt motors are suitable for

 Blowers and fans.
  All of this.
 Lathes.
 Centrifugal pumps

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Electrical Machines
At stand still condition the value of slip is

 finite value
 1
 infinite value
 0

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Electrical Machines
For small value armature current Ia the torque developed by a DC series motor is proportional to

  Ia.
  1/Ia.
  Ia2.
  √Ia.

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Electrical Machines
A synchronous machine has P number of poles, find the relation between electrical angular momentum (ωe) and mechanical angular momentum (ωm)?

 ωe = P*ωm
 ωe = ωm
 ωe = 2/P*ωm
 ωe = P/2*ωm

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