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Two equal point charges are placed on x=...

Two equal point charges are placed on x=-a and x=+a on the x=axis. Another point charge Q is placed on the origin. IF this charge is displaced a small distance x along x-axis, then the change of potential energy approximately will be proportional to

A

`x`

B

`x^2`

C

`x^3`

D

`frac(1)(x)`

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  • Two equal point charges are fixed at x=-a and x=+a on the x-axis. Another point charge Q is placed at the origin. The change in the electrical potential energy of Q, when it is displaced by a small distance x along the x-axis, is approximately proportional to

    A
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    B
    `x^2`
    C
    `x^3`
    D
    `1/x`

  • Two charges, each equal to q are kept at x = - a and x = a on the X-axis. A particle of mass m and charge q_D=q/2 is placed at the origin. If charge q_0 is given a small displacement (yltlta) along the y-axis, the net force acting on the particle is proportional to

    A
    y
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    `-y`
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  • Two charges of equal amount +Q are placed on a line. Another charge q is placed at the mid-point of the line. The system will be in equilibrium if the value of q is

    A
    `-Q/4`
    B
    `-Q/2`
    C
    `+Q/2`
    D
    `+Q/4`

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