what is significance of B-H curve? how it differs form ordinary transformers to Amorphous Transformer?

2 Answers   BARC,

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why we use separate earthing for two seprate machine??

1 Answers  

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Differentiate between ideal and non-ideal voltage sources?

0 Answers  

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why only dc is given as excitation...why not ac???

2 Answers   TCS,

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Transformers with dc supply

4 Answers  

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Why PT is fitted in incomer panel.....?

1 Answers  

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what should be the value of helathy insulation b/w two cores of LT cable.

2 Answers  

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why a bulb glow when connected with two end phase and neutral respectively.

1 Answers   ACME,

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what's the meaning of the negative going half cycle in the circuit containing a bulb and a switch in series with a input ac source. i mean what happens in the -ve cycle. the dir. of current changes or any other thing. if dir. changes then why we use fuse in only phase wire.

2 Answers  

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Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha

0 Answers  

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what is the safety points of vaccum circuit breaker.

0 Answers  

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A 60w bulb & a room heater are connected in series.if 60 w bulb is replaced by 100w then what will be the effect on heater out & why?

6 Answers  

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