Three charges - q , Q and - q are placed at equal distances on a straight line. If the potential energy of the system of charges is zero, then the ratio Q : q is

Question

Three charges - q , Q and - q are placed at equal distances on a straight line. If the potential energy of the system of charges is zero, then the ratio Q : q is, 1 : 1, 1 : 2, 1 : 3, 1 : 4

MARKS App · Accepted Answer

U = - k Q q r × 2 + k q 2 2 r = 0 2 k Q q r = k q 2 2 r Q q = 1 4

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