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Electrical Machines

Electrical Machines
Maximum power developed depends on

 load angle
 both 1and 2
 reactance
 voltage

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Electrical Machines
1 KVA, 230 V, 50 Hz, single phase transformer has an eddy current loss of 30 watts. The eddy current loss when the transformer is excited by a dc source of same voltage will be

 zero watt
 30 W
 more than 30 W
 less than 30 W

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Electrical Machines
Which motor cannot be started on no load?

 cumulative compound motors
 shunt motors
 series motors
 both B and C

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Electrical Machines
The speed of a 3-phase induction motor operating in its stable region

 decreases with increase in the load torque.
 remains constant.
 decreases with decrease in the load torque.
 increases with increase in the load torque.

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Electrical Machines
Which type of motors uses slip rings?

 Both Synchronous and Induction motor
 Synchronous motors
 Induction motors
 DC Shunt Motor

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Electrical Machines
The voltmeter connected across a generator reads voltage same at no load and at full load (rated). The generator is of the type

  level compound.
 series generator.
  short - shunt generator.
  shunt generator.

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