Why is back emf used for a DC motor? Highlight its significance.

0 Answers   ABB,

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Which capacitor is used in ceiling fans ?

1 Answers  

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what happens if a carbon brush is touching the top end of the commutator

2 Answers  

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if we give 60 hz single phase supply to the transformer used in europe , than what will happen

0 Answers   Core Logic,

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if we convert ampers into kw,which one formula use by us,pls tell me?

11 Answers   ABB,

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Where -48 volt DC use & why?????????

10 Answers   Ericsson, INDUS, Indus Towers, Telecom,

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why secondary of c.t. will kept open ?

4 Answers   L&T,

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how do u gauge the size of the cable ?for eg. consider a 300 sqmm L.T Cable.How do u determine the size of the cable seeing it pratically?

0 Answers   Bhel, Jai Balaji, Rashmi Group,

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How many turns are there in primary winding? (In Transformer)

0 Answers   Philips,

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What is the difference between single point and double point bonding. please kindly detail about bonding of cables.

0 Answers  

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how we can convert 3 phase to single phase without using any transformer

8 Answers  

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Why frequency fix in 50 Hz?

6 Answers  

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