physics question?

Question

if we are given 2 charges Q and -Q,
equipotential lines are symmetrical above the mid-point between -Q and Q, anybody can explain it plz =]

Answer 1

Sure ... if you have two charges of opposite sign, they will create the same voltage at the same distance away from each with reversed signs of course. The equipotential for a plane will be a line which runs halfway between them; when you add the potentials there, you get zero. for a three dimensional system, it's a plane between them.

Answer 2

Actually, they're co-axially symmetric around the line between Q and -Q.

HTH ☺

Doug