when ac current flows thru d coil of a contactr,it energizes,magnetic field attracts d contact of the coil...nw wont dt ac current in d contct induce current back on to d coil thru mutual inductance leading to high currnt in d coil

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two bolbs of 100w and 40w respectively connected in series across a 230v supply.which bolb will glow bright and why?

16 Answers   DRDO, PSPCL, Siemens,

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why the rating of transformer in k.v.a

4 Answers  

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how to decide the ratings of the busbar in electrification.give me the proper thumb rule or procedure

1 Answers   ABB,

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What is slope...? Explain slope 1 and slope 2...?

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What is Load sharing of Transformer ?

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Define what is power quality meter ?

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what irequirment need to be followed when working on live equipment

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how to select a air/vacuum circuit breaker.is there any thumb rule???

1 Answers  

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how to set the time in digital timer ?

0 Answers  

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Why more than 2.5 MVA distribution transformers (secondary is 440V)are not used in india.

1 Answers  

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rating of ups??

1 Answers  

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