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Electrical Machines

Electrical Machines
A 3-phase, 2 pole, 12 slot synchronous machine is operating at synchronous speed. Find the slot angle?

 18°
 30°
 60°
 20°

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Electrical Machines
A 4 pole dc motor with armature winding resistance of 0.6 ohm receives a supply of 230 Volt. If the back emf produced during running condition is equal to 210 volt. Calculate the current flowing through the armature at this point.

 29 Amp.
 44.47 Amp.
  43 Amp.
  33.33 Amp.

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Electrical Machines
Two windings provided on the stator of 1-phase induction motor, one main winding and the other auxiliary winding are connected

 in parallel
 through inductive coupling
 in series
 either of these depending on the design of the motor

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Electrical Machines
To eliminate 5th harmonic in the induced voltage phase breadth should be

 18°
 30°
 36°
 72°

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Electrical Machines
In salient pole synchronous machine, the reluctance power varies as

 sinδ
 cosδ
 sin2δ
 cos2δ

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Electrical Machines
A 3-phase 6 pole 50 Hz induction motor is running at 5% slip.What is the speed of the motor?

 900 rpm
 850 rpm
 950 rpm
 1000 rpm

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MORE MCQ ON Electrical Machines

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