SKIN EFFECT 73 



part is i'r. Thus the total drop per centimeter of wire, 

 which is the same at all parts of the section, is 

 V u<$> io~ 8 + i'r 



{ + ^ + . .+&=-" + .. A 



2 2 3 2 W 2 / 



. \ 

 h 



/ 



2* 3 n ' 



The above expression for V is the same for all values of x, 

 and we may therefore equate each coefficient of x 2 , x 4 , etc., 

 to zero. Thus, putting 



corp 2 io" 9 



*- = m, 



we have a\ = 



a 2 = 



P* 

 imai 



a " = n* P * 



. . etc. 



and 



V 



n' 



Substituting the values of a\, 0%, etc., we obtain 

 V = OQT -h^Vco icr 9 



+ J ""**\jfs i V/ //t '/ K'U/^ [ [ \J llv ) "1)K [ 



/I \ 9 I /I \ o I " 71 \~o I 



