6.Electric Field from a Sheet of Surface Charge a.Electric Field from a Line Charge 00 dq1 =Xodz (r2+z2)1/2 dE2 dEdE:+dE2 r2+z21/2de1 dq2=入odz 一00 An infinitely long uniform distribution of line charge only has a radially directed electric field because the z components of the electric field are canceled out by symmetrically located incremental charge elements as shown above. 6.641,Electromagnetic Fields,Forces,and Motion Lecture 3 Prof.Markus Zahn Page 7 of 126.641, Electromagnetic Fields, Forces, and Motion Lecture 3 Prof. Markus Zahn Page 7 of 12 6. Electric Field from a Sheet of Surface Charge a. Electric Field from a Line Charge