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Electrical Machines

Electrical Machines
The power factor of an induction motor operating at no load will have a value around

 0.2 lead
 0.9 lag
 0.2 lag
 unity

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Electrical Machines
Which of the DC Motor use flywheel?

 Shunt motor.
 Differently compared motor.
 Cumulatively compound motor.
 Series motor.

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Electrical Machines
A Shunt generator running at 1000 rpm has generated emf of 100 V. If the speed increases to 1200 rpm, the generated emf will be nearly

 175 V
 240 V
 140 V
 120 V

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Electrical Machines
For a transformer to be tested at full load conditions but consuming only losses from the main, we do

None of these
 OC and SC tests
 load test
 back to back test

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Electrical Machines
In single phase rotary converter the number of slip rings will be

 four.
 two.
 three.
 six.

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Electrical Machines
In which of the following, voltage regulation may be zero or negative

 lagging power factor
All of these
 unity power factor
 leading power factor

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