what is skin effect? why is it absentin dc system

Answer Posted / rama krishna

The skin effect is the tendency of an alternating electric
current (AC) to distribute itself within a conductor so that
the current density near the surface of the conductor is
greater than that at its core. That is, the electric current
tends to flow at the "skin" of the conductor. The skin
effect causes the effective resistance of the conductor to
increase with the frequency of the current. Skin effect is
due to eddy currents set up by the AC current.

Is This Answer Correct ?    6 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

At the starting of dc motor and syn.motor and induction motor high current flowing through the winding. Due to this the windings burnt out. To avoid this different types of starters are used. But incase of transformer what Will be used (At starting no emf is induced in the primary winding)?

1542


why star point of HT motor not earthed?

1748


Why should be the frequency 50 hz 60hz only why not others like 45, 95 56 or anything , why should we maintain the frequency constant if so why it is only 50 hz 60hz?

706


Where can I get CPWD electrical specifications & Shedule of rates? Please help me

1816


What is the maximum number of swithes that can be connected in series up to down stream point in an LV Distribution system?

1531






1. What is the exact formula for one weber? for example,(one ampere = one coulomb electron of electrons crossing a point of conductor at one second. i.e, 1A=1Q/1sec)

1420


how to measure earth resistance of a substation

2743


Why neutral is not used in three phases dol starter

1416


What Is Connection APFC Panel In Compony.

937


What is the polarization index value ? (Pi value)and simple definition of polarization index ?

760


what is the standard values(Megger test) of resistances between L&N,L&E and N&E for a system on IEE regulations?

1661


what is counter poise conductors

1680


Explain dc generator with its types?

640


Why can't we take NO LOAD TRIAL of motors having V1 mounting??

1513


List the characteristics of filter?

624