Dear Meeker, i found some doubt in BELA, so i hope u can explain to me. The doubltful that i found is in the femmplot the electric field intensity is (V/m)and how we define the distance(m) which is using to calculate the E. thank you. Regard, Nicholas __________________________________ Do you Yahoo!? Yahoo! Finance: Get your refund fast by filing online. http://taxes.yahoo.com/filing.html