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Electrical Machines
In which of the following generators negative voltage regulation can occur?
series generators
over compound generator
both B and C
shunt generator
series generators
over compound generator
both B and C
shunt generator
Answer
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Related Question
Electrical Machines
The working principle of transformer depends on
Coulombs law.
Newtons law.
Amperes law.
Faradays law of electromagnetic induction.
Coulombs law.
Newtons law.
Amperes law.
Faradays law of electromagnetic induction.
Answer
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Electrical Machines
Which of the following motors has negative speed regulation?
Shunt motors.
Series motors.
Differential compound motors.
Both B and C.
Shunt motors.
Series motors.
Differential compound motors.
Both B and C.
Answer
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Electrical Machines
Skewing of the rotor in a 3 - Φ squirrel cage induction motor reduces
noise and pullout torque, but increase parasitic and starting torque.
noise and parasitic torque, but increase starting and pull-out torque.
noise, parasitic torque, starting torque and pull out torque.
noise, parasitic and starting torque, but increase pull out torque.
noise and pullout torque, but increase parasitic and starting torque.
noise and parasitic torque, but increase starting and pull-out torque.
noise, parasitic torque, starting torque and pull out torque.
noise, parasitic and starting torque, but increase pull out torque.
Answer
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Electrical Machines
When maximum starting torque is obtained, rotor power is
Answer
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Electrical Machines
Cogging and crawling are phenomena associated with
the former at a fraction of its rate speed and the latter during starting.
the former during starting and the latter at a fraction of its rated speed.
any of the above.
cage induction machines and they are essentially the same.
the former at a fraction of its rate speed and the latter during starting.
the former during starting and the latter at a fraction of its rated speed.
any of the above.
cage induction machines and they are essentially the same.
Answer
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