why there is a humming noise in transformer

6 Answers  

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How power cable & control cable can be differentiate from each other ?explain?

14 Answers   Aster, Finolex, TCE,

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During Millivolt drop test current leads are applied in the extreme ends and voltage leads are given just before the current leads.. what will be the difference if voltage leads are given in the extreme ends? and why?

1 Answers  

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when we conduct high voltage testing why milli amp. is required?

2 Answers  

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Since phi is the angular displacement between V & I, then why we use phi in power triangle ie. when showing active, reactive & apperent power in triangular manner & if it is ok then where is V & I in the triangle.

1 Answers  

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SSC JE ELECT.

1 Answers   CPWD, SSC,

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what is reverse power relay brief explanation and in b/w where it is connected

0 Answers  

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The height to which the liquid in a tank to be maintained for a certain constant velocity?

0 Answers  

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In Dyn11 power transformer if any one of the 3 phases connected to earth in star connected side then please explain effect of the current flow in delta connected side of transformer.(In this case if one phase is shorted to ground in star connected side then we observe the current flow in two phases only not three phases in delta connected primary side. Please explain why it is so?)

0 Answers  

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how to find the 2500 KVA transformer rated primary and secondary volt and current?

4 Answers  

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condider as 100 w lamps glowing . for completing a one unit how much time it should glow

3 Answers   Avalon,

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why tungsten is used in incandescent lamp instead of nichrome though nichrome has high melting point

2 Answers  

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