Answer / prashant

the cables used in transmission lines are of higher rating
as compared to communication line. if ever they were same
then the distortion in communication due to the harmonics
would also increase. henceforth for better communication and
better transmission these lines have different ratings.

Answer / gunasekaran

power rating is more in transmission line like KVA or MVA
communication line power rating in mVA

In 110V DC supply,if a closed circuit gets open, How can we identify the voltage which is measured after the resistor(4KOhm) which is open with negative.it shows 55V +ve when measured, also the actual positive source is 55V +ve .Because there is no voltage drop in open circuit. How can we identify whether this is the voltage which is series with the resistor or the DC source direct +ve.

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sir my exam is on 19/6/2013 under electrical branch pls send me sample aptitude questions as well as sample technical questions for jindal steel and power company

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