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6. Two point charges of opposite signs and different magnitudes are separated by a
distance r as shown in the diagram below. At a point P between the charges, the electric
potential is zero volts. This point is located at a distance r, from the positive charge and a
distance r, from the negative charge. What is the distance r, in terms of r and the magnitude of
the charges?
91 = +|91|
92 = -1921
r2
r.

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