Potential Due to Point-Charges: Two Point Charges, Q and -3Q

question 38

Essay

Potential due to point-charges: Two point charges, Q and -3Q, are located on the x-axis a distance d apart, with -3Q to the right of Q. Find the location of ALL the points on the x-axis (not counting infinity) at which the potential (relative to infinity) due to this pair of charges is equal to zero.

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