why there is a humming noise in transformer

6 Answers  

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when the diameter of the core and cable is doubled, the value of capacitance ?

2 Answers  

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losses in transmission lines ?

0 Answers  

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why nearly all the voltage levels are in the multiples of 11 like 3.3 ,6.6 ,33 ,11 kv.....

8 Answers   Suzlon,

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why knee point voltage should be high in Ct for differential protection

1 Answers   NTPC,

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why ac wave is sinusoidal not square or triangular wave what will be reason

1 Answers   ACPL,

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can d.c.transformer exist? if yes then what its max. rating?

6 Answers  

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Which Kind of machines(in terms of poles) give the smoothest DC

0 Answers  

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LT cable fault chaecking equipment and to find out the distance at what distence it failure . Name and where it is available?

0 Answers   Himatsingka Seide Ltd,

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How will be the single line diagram of series trip HT breaker? how it works?

0 Answers   HAL,

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Whether the LIGHTNING is AC or DC?

9 Answers   Bhel, IEEE,

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1.what type of wave is produced from i.online ups ii.offline ups iii.inverter.why don't we use inverter instant of offline ups for computer,what's the reason?

2 Answers  

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