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![[Post New]](/templates/default/images/icon_minipost_new.gif) 2 Aug 2007 15:36:56 IST
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divide the ball into infinite shells...charge at one shell...
dq= (rho)4pir^2 dr
put the value of rho=ar and integrate from 0 to R ...u will get toatal charge ...and hence u can find E.
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