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aftershock
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Homework Statement
Two point charges (opposite signs, equal in magnitude) are a distance d apart. Point P is a distance z above both charges and horizontally equidistant. Find the electric potential at point P.
Homework Equations
Kq/r
The Attempt at a Solution
It's my understanding that direction does not matter with potential so r is the same value for both. We can add the potentials together to get total potential. Plugging in q for the first charge and -q for the second gives 0.
I know that's not right, that would imply the electric field is zero which is obviously incorrect.
What am I doing wrong?