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.

whay we transmit power in 3phase no in 4 or 2 or 5......etc?

4 Answers   CCCL,

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what is the principal of starting of a three phase induction motor.

2 Answers   Moser Baer,

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There is one 40MVA oil cooled transformer (yet to commission), filled with 95% oil and we are trying to fill 5% Nytrogen in that transformer so that there should not be any foreign component inside. But even though there is no leakage, nytrogen is not withstanding inside transformer, within a day or two pressure guage is showing 0. Why is it soooo? Pls reply.

1 Answers  

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How we can calculate the capacity the Air Condition capacity? like 1 or 1.5 ton's, What is the means of volume of Ton's in capacity of Air Compressor? Why in ton's,? not any other Volume?

2 Answers  

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in domestic service connection,what is service main?

1 Answers  

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if an alternator or turbine using fuel to produce ele energy and we didn't connect load to the ends then where was gone the ele energy

2 Answers  

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Dears we deal in Chemical are Plate earthing. Kindly call if any requirement and questions. Tech Earth Solutions Mohit Verma 8791071007

0 Answers   XYZ,

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Why transformer ratings in KVA not in KW?

6 Answers   ABB,

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Does induction motor start with dc power supply????

4 Answers   Essar,

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What is the form name of 'c' license, I want to download in web

0 Answers   BMM, Ceebros Hotels,

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If we are given a 10 amp cable type and asked to calculate the number of cores used and the thickness of the cable, how do we do it?? please help...urgent!! i hope the question is clear enough!!

0 Answers  

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what is the sludge current

0 Answers  

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