shinyjasmine


{ City } coimbatore
< Country > india
* Profession * student
User No # 70928
Total Questions Posted # 3
Total Answers Posted # 2

Total Answers Posted for My Questions # 4
Total Views for My Questions # 18925

Users Marked my Answers as Correct # 12
Users Marked my Answers as Wrong # 4
Questions / { shinyjasmine }
Questions Answers Category Views Company eMail

why motors are rated in HP?

HCL, ncpl,

3 Electrical Engineering 5788

in HVDC transmission system ,monopolar link has one conductor usually a negative polarity and use ground or sea return ?through negative polarity we could pass electricity or not yes means how it is possible

Gyana, NNN,

1 Electrical Engineering 11749

what is the reason for connecting hvdc monopolar line with negative conductors

 Electrical Engineering 1388



Answers / { shinyjasmine }

Question { 40655 }

what is skin effect? why is it absentin dc system


Answer

The tendency of the AC current to concentrate along the
surface of the conductor is called skin effect.
The apparant resistance of AC is always higher than
DC .The alternating magnetic flux created by an ac current
interact with the conductor , generating a back emf which
tend to reduce the current in the conductor . The center
portion of the conductor is affected by the greatest
number of lines of force.The electromotive force produce in
this way by self inductance varies both in magnitude and
phase througr the cross section of the conductor, being
larger towards the centre and smaller towards the outer .so
the flow of current is maximum in the outer surface of the
conductor ,called as skin effect

In dC there is no inductance an dno skin effect.

Is This Answer Correct ?    5 Yes 0 No

Question { Ecil, 5812 }

Tesla is the unit of which parameter?


Answer

Its the SI unit of magnet flux and it is equal to one
weber/square meter

Is This Answer Correct ?    7 Yes 4 No