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KVPY Sample Paper KVPY Stream-SX Model Paper-31

  • question_answer
    Four equal charges of magnitude q each are placed at four corners of a square with its centre at origin and lying in y-z plane. A fifth charge +Q is moved along x-axis. The electrostatic potential energy (U) varies on x-axis as:

    A)

    B)

    C)

    D)

    Correct Answer: B

    Solution :

    At the centre of square net force on +Q is zero. But at \[x\,=\,0\], it is in unstable equilibrium position i.e., potential energy is maximum.


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