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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What is the calculating formula for HT and LT amps in a transformer.

22 Answers   Cipla, K-Electric,

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in a transmission line if the load is suddenly increased in the receiving end of the system the phase shift will ?

1 Answers  

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why skin effect is decreases with decrease with frequency? why skin effect occur

5 Answers   Kirloskar,

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What mean power grid fail. why power grid fail.

1 Answers   Intas, Tech Mahindra,

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In power transformer tappings are provided on A high voltage side B low voltage side C In middle of both the windings D both high and low voltage side

2 Answers   NNN,

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How can Inductive load reduce the line voltage of HV transmission line and vice versa Capacitive load?

1 Answers  

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A synchronous machines has higher capacity for (1) Leading power factor (2) Lagging power factor (3) Does not depend upon the power factor of machine (4) None of the above

3 Answers   JSW,

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How much costly in percentage wise is sandwich busduct costly than air insulated busduct of any rating?

0 Answers  

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1]how the voltages and frequency are achieved on ships. 2]how does the line and phase voltages are related on ships.

3 Answers  

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what is the reason of current flow in nutral although load is balanced (three phase equal current)

3 Answers  

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Why GRR starts from 60% of motor speed why not less than 60%?

0 Answers  

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