why we are giving D.C. supply to field of an alternator, why can't we give the a.C. supply

12 Answers   APTransco, Proman,

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What is the difference between Isolator annd Circuit Breaker.

21 Answers   ABB, Lanco, NTPC, Power Grid, RInfra,

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What is the life of MCCB

1 Answers   Siemens,

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the resstance of a thermistor is 5000 ohm at 25degreeC and coefficient is .04/degCel. A measurement with lead resitance of 10 ohm will cause an error of

1 Answers   GATE,

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What is meant by Resonance what are the different types of resonance and what are uses of them?

14 Answers   Infosys, NTPC,

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Which of the following alternatives will be cheaper (1) A 100 h.p AC, 3-phase motor (2) Four motors of 25 h.p each (3) Five motors of 20 h.p each (4) 10 motors of 10 h.p each explain

0 Answers  

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what is rating providing of contactor,relay,fuse unit for motor output power

2 Answers  

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What is the distance between body earthing and neutral earthing.?

1 Answers  

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We have Diesel generator of 200KW. fuel consumption is always same,even connected light load or full load. Is it right?

0 Answers   ARDE,

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what are the losses of capacitor??

1 Answers  

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What is dynamo?How it works and what is the function of dynamo in a DG.

0 Answers  

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A jet of fluid strikes a plate What was the force required to counter it?

0 Answers  

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