Answer / uzair bin khalid

when we switch on the switch and load is not connected at
home, no is electricity wasted bcz loop is not completed.

what is effect of brush shift in machine?

1 Answers  

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WE know that for Inductor X=2pifL,In DC f=0,then X=0 so,V=IX=0;But In the DC excitation of rotor of AC generator,DC motor field coil which coils are inductor so why does not applying DC voltage short the rotor coil of AC generator and field coil of motor?If it would then DC source might be damaged but it is not happened. Why does the strand conductor of Electrical power transmission line make twist?

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How can i calculate knee point voltage of 800/5A Current transformer?please explain me with suitable calculation?

2 Answers  

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Instead of single phase(220), if we apply Phase to phase (R&Y)supply (eg: for lighting fixture). what will be the power formula?

1 Answers  

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I have a transformer whose primary operates at 230V, 50Hz for which the secondary voltage will be 12V, 50Hz. What will be the secondary voltage if the primary is fed with 400V, 8KHZ Signal?

6 Answers   ABB,

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Why let through energy not considered for ACB breaker while cable sizing?

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The normal highest generated voltage in India is a) 6.6KV b) 132KV c) 11KV

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What will be the minimum megger value of 1700 KVA Transformer? a) Do megger value varies according to climate conditions and area . b) If megger value is 100 mega ohm is it good for new transfomer. Explain?

4 Answers  

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what will happen if secondary of potential transformer (220kv/110volt) of any metering core or protection core (cables) of any phase got earthed??

1 Answers  

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definition of transformer

10 Answers  

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How to calculate the slip ring induction motor rotor current and voltage.

1 Answers   Bhel,

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how the aircraft outer body and inner body is separated ?

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