Explain What will happen when direction of field current is changed (i.e, field excitation is reversed) in the following machines? 1) Alternator 2) Synchronous Motor 3) D.C Generator ( Shunt or Seies ) 4) D.C Motor ( Shunt or Seies )

3 Answers   NTPC, Transco,

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HOW TO CALCULATE THE DOMESTIC POWER FACTOR?

3 Answers  

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What is the function of RCBO? What are the different sensitivity ratings & each application?

0 Answers   L&T, Legrand,

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what is impedence of transformer? its formula

1 Answers  

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how to find the capacitance value of the motor while running??

0 Answers  

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How do we calculate transformer oil in liter from the rating of the transformer.

0 Answers   BARC,

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What is the black star?

2 Answers  

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What is the purpose of SSVW, IOVW, DVDF Tests in transformer? Those who are answering, pls send mail ids also.

1 Answers  

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why we are using the ac supply in domestic purpose why don't use dc supply

6 Answers   Airtel, SSIL,

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what is induction motor

2 Answers  

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What is the operational principle of direct current current transformer and direct current potential transformer?if possible plz reply with ckt. diagram.

1 Answers  

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What loads the lagging and leading effects comes in a circuit?

5 Answers  

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