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Electrical Machines

Electrical Machines
The output power of any electrical motor is taken from the

 Armature.
 Motor frame.
 Field.
 Coupling mounted on the shaft.

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Electrical Machines
Which 1 - Φ motor does operate at high power factor?

  Capacitor run.
  Shaded pole.
  Capacitor start.
  Split phase.

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Electrical Machines
A 10KVA auto transformer, turn ratio is 0.4. Find the power transferred inductively?

 4 KVA
 10 KVA
 6 KVA
 0 KVA

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Electrical Machines
An unexcited single phase synchronous motor is

  universal motor.
 repulsion motor.
 AC series motor.
 reluctance motor.

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Electrical Machines
In a seperately excited DC Motor if field current is increased, it will

 Reduce armature heating.
 Increase speed
 Increase acceleration duration.
 Reduce starting torque.

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Electrical Machines
A three phase induction motor has a synchronous speed of 1500 rpm the machine runs at 1460 rpm at a particular load. The slip at this load is ___________.

  2.67 %.
 5 %.
 1.5 %.
  30 %.

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