Interested to Buy Any Domain ? << Click Here >> for more details...
Why effective AC resistance is more than DC resistance of a
transmission line?
- 9 Answers
- 25454 Views
- HCL, ONGC, I also Faced
- E-Mail Answers
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 |
how to calculate the chiller load from TR to KW?
What are differences between Voltage, EMF & Potential difference ?
How many types of lightings are there
when it is possible kvrah lead & fundamental kwh be equal in electonic trivector meters (3 ph)
what is the disadvantages of common earthing for AC and DC equipment? (i am talking about inverter control room and inverter duty transformer earthing is common...?)
Can you use a different size cable to complete a circuit if you run out what you are using?
State angle criterion.
What happens when reactive power enters a system?
What is the formula formula for Busbar sizing and what are the things to be consider for Busbar Calculation?
I have cleared IOCL written exam(Electrical). My intv is on 6/9/2008.can anyone guide me & tellme abt intv questions.
WHAT IS THE TECHNICAL SPECIFICATION OF C CURVE & D CURVE LEGRAND MAKE MCB
What will happen if twice the rated voltage is applied to a DC motor?
-
Civil Engineering (5086) - Mechanical Engineering (4456)
- Electrical Engineering (16639)
- Electronics Communications (3918)
- Chemical Engineering (1095)
- Aeronautical Engineering (239)
- Bio Engineering (96)
- Metallurgy (361)
- Industrial Engineering (259)
- Instrumentation (3014)
- Automobile Engineering (332)
- Mechatronics Engineering (97)
- Marine Engineering (124)
- Power Plant Engineering (172)
- Textile Engineering (575)
- Production Engineering (25)
- Satellite Systems Engineering (106)
- Engineering AllOther (1379)
