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Electrical Machines

Electrical Machines
To eliminate the 5th harmonic in the induced voltages their respective pitch factor angle should be

 36°
 72°
 30°
 18°

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Electrical Machines
Transformers operating in parallel will share the load depending upon their

 leakage reactance.
 efficiency.
 percentage impedance.
 rating.

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Electrical Machines
A 230 volt dc motor has an armature winding resistance of 0.5 ohm. Calculate the emf induced by the motor if the full load armature current is 23 ampere.

  218.5 volt.
  None of these.
  120 volt.
 220.4 volt.

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Electrical Machines
The principle of dynamically induced emf is utilized in

 thermocouple.
 generator.
 choke.
 transformer.

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Electrical Machines
A 8 pole, 50 Hz single phase induction motor is running at 690 rpm. Its slip with respect to forward field is

 1.92
 0.08
 -0.08
 -1.92

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Electrical Machines
A DC 4 pole lap wound generator is running at 1000 rpm having 1200 conductors and flux density is 10 mwb. find the generated emf?

 20V
 100V
 200V
 10V

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