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

0 Answers   ABB,

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single phase for 230 then why three phase are 440 volt

4 Answers   ACIL,

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How can we calculate earth mat conductor size ..? & give the formula to determine earth conductor size?

3 Answers  

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What is the difference between reciprocating & rotary motors in AC units, which is the best one in terms of operation.

2 Answers   MacLellan,

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What is evaporator & condencer & compressor

0 Answers   Standard Chartered,

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can we measure +,-.zero sequence current ....? if so how can ???

2 Answers   NLC,

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In winding design, the angle of chording (β) is nearly equal to A 45 degree B 60 degree C 30 degree D 90 degree

1 Answers   Reliance,

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why lightining is not available in swith yards?

1 Answers  

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Hysteresis loss in a core is due to what reason or property of the material used for that core?

1 Answers  

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How many 2 ton window A/c can runs on a 125 KVA generator?

3 Answers  

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how to distinguish between ac motor and dc motor without seeing name plate of it.only seeing its getup look

3 Answers   Nahar, Siemens,

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which network topology offers the greatest level of tolerance?

0 Answers  

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