y What if we go very far away from the rod? r>>l E E ACSO r√r2+(L/2) E 4兀 Just like a point charge. makes sensey r What if we go very far away from the rod? E        = 2 4 0 1 r Q E   r  L Just like a point charge… makes sense!         + = 2 2 4 0 ( 2) 1 r r L Q E  