Why effective AC resistance is more than DC resistance of a
transmission line?
Answers were Sorted based on User's Feedback
Answer / sirajudheen nellur
Because in AC there is a phenomenon called skin effect, ie
the AC travels only through outer surface of the cable. It
is the same reason why we use stranded wires for AC
Is This Answer Correct ? | 50 Yes | 5 No |
Answer / paridhi jain
because it is concentrated at d surface while dc resistance
is distributed uniformly throughout d conductor
Is This Answer Correct ? | 19 Yes | 2 No |
Answer / anil nalla
conductor carries more current on its surface in AC...But in
DC ,current is distributed uniformly.
Is This Answer Correct ? | 8 Yes | 1 No |
Answer / paridhi jain
because it is concentrated at d surface while dc resistance
is distributed uniformly throughout d conductor
Is This Answer Correct ? | 9 Yes | 3 No |
Answer / m.ravi
skin effect and corona losses will more with frequency and
resistance
Is This Answer Correct ? | 5 Yes | 1 No |
Answer / nayeem( cuet)
When DC current passes through any conductor,the current
uniformly distributed over the whole surface of the
conductor. But AC current not distributed uniformly rather
it has the tendency to concentrate. this is known as skin
effect. For this reason AC resistance is greater than DC
resistance of a transmission line.
Is This Answer Correct ? | 4 Yes | 0 No |
Answer / mohd. kashan wali
AC resistance is greater than DC resistance.
The reason is:-
In AC, Skin effect occurs which means that current tends to flow through the skin of the wire than through the inner core,so net area of current flow in AC tends to reduce.
And Resistance is inverse proportional to Area, and as the net area of current flow decrease, so NET AC RESISTANCE INCREASES.
Now in DC current, there is uniform current flow.So net area of current flow through conductor is greater than AC,
THUS DC RESISTANCE IS LESS THAN AC
Is This Answer Correct ? | 4 Yes | 0 No |
Answer / pawan pal
Ac resistance is high than dc.
Due to corona effect and skin effect ,
Frequency, impedance.
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / naresh
in case of ac transmission line, the impedance of the line
may be due to positive ,negative &zero sequence
components.whereas in case of dc there will not be any
effect of either of these components on transmission line.
Is This Answer Correct ? | 0 Yes | 3 No |
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