Answer / er. sanjana singh

ac current is flow in alternating nature & it have frequency.
dc current is direct current and flow in straight direction & dc current has no frequency..

Answer / sureshkumar

ac current has skin effect,corona losses and dc current does not having skin effect,corona in transmission lines 


ac transmission can change voltage levels by using step-up transformers and in dc it is not possible

Answer / sureshkumar

in ac we can change voltage levels by using power transformers 
and in dc can not change voltage levels because we not using power transformers

Answer / syamkumar

ac current changes it's magnitudeand it has frequency but
dc cureent doesn't changes it's magnitude and it didn't
have frequency.

which are the criterias needed to select the kind of neutral earthing(solid earthing,resistance earthing,etc.) at various voltage levels in electrical distribution?

0 Answers  

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what is pressure relief valve?where it is used????

4 Answers   Mecon,

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If load current is 70amps or 50amps what range of CT to install for ampere metering

3 Answers  

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What is the unit of vaccum?

14 Answers   Manhattan,

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Is it necessary to seperate the DG earth grid with Electricity Board earth grid for protecting the DG set. if yes why?

2 Answers   BARC,

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In a Circuit how the MCB and Fuse ratings are calculated. And shall the fuse follws the MCB or it is otherwise?

16 Answers   Emerson, HCL, Thirumalai Chemicals,

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Wht is the meaning of floating neutral

9 Answers   Cipla,

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What is the significance of %Z in case of transformer?

1 Answers  

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what is die electric strnth of transformer ?

0 Answers  

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what would be the earth to neutral voltage in industries? if it is not main Taine then what will happen?

4 Answers  

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different b/w counter poise and ground wire

1 Answers   L&T, TCS,

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what is meant by insulation voltage in cables? explain it?

4 Answers   ABB,

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