skin effect in conductors

[nonlinear]

I learnt that when high frequency voltage is applied across a conductor, current flows only through surface or skin of the conductor. This is called skin effect.
Why does skin effect exist?

 

[venkat_kvr]

see it

 

[venkat_kvr]

see it

 

[venkat_kvr]

the above two files explain abt txlines,this pdf explains abt skin effect

 

[nonlinear]

Thanks to all for the informaition on skin effect. The contents are indeed good and explained lucidly.