A positive charge q1 is located to the left of a negative, Ask an Expert

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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 potential is zero. The first place is 4.00 cm to the left of the negative charge. The second place is 7.00 cm to the right of the negative charge. What is the distance between the charges?

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