A charge q is at the origin. a charge -2q is at x 9.10 m, Ask an Expert

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A charge +q is at the origin. A charge -2q is at x = 9.10 m on the +x axis. (a) For what finite value of x is the electric field zero? (b) For what finite values of x is the electric potential zero? (Note: Assume a reference level of potential V = 0 at r = infinity.)

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