JEE Main & Advanced Physics Electrostatics & Capacitance Question Bank Electric Field and Potential

  • question_answer
    On rotating a point charge having a charge q around a charge Q in a circle of radius r. The work done will be [CPMT 1990, 97; MP PET 1993; AIIMS 1997; DCE 2003; KCET 2005]

    A)                    \[q\times 2\pi r\]

    B)                                      \[\frac{q\times 2\pi Q}{r}\]

    C)                    Zero

    D)                                      \[\frac{Q}{2{{\varepsilon }_{0}}r}\]

    Correct Answer: C

    Solution :

                 Since charge Q moving on equipotential surface so work done is zero.


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