A positive charge +q1 is located to the left of a negative charge −q2. On a line passing through the two charges, there are two places where the total potential is zero. The first place is between the charges and is 3.35 cm to the left of the negative charge. The second place is 7.65 cm to the right of the negative charge.
(a) What is the distance between the charges?
(b) Find |q1|/|q2|, the ratio of the magnitudes of the charges
The Attempt at a Solution
I don't know where to start. I know that I need to solve for the distance between +q1 and the spot 3.35 cm to the left of the negative charge to be able to solve for the distance between them. I'm just not sure how to use the charge to the right of -q2.