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Three charges -q, Q and -q are placed at...

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

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Knowledge Check

  • Three point charges each equal to q are placed on the vertices of an equilateral triangle of side l. The potential energy of the system is

    A
    `1/(4 pi epsilon_(0))(q^2)/(l)`
    B
    `1/(4 pi epsilon_(0))(2q^2)/(l)`
    C
    `1/(4 pi epsilon_(0))(3q^2)/(l)`
    D
    `1/(4 pi epsilon_(0))(4q^2)/(l)`

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