In a certain charge distribution, all points having zero potentia… - Vidyadip

Question

In a certain charge distribution, all points having zero potential can be joined by a circle S. Points inside S have positive potential and points outside S have negative potential. A positive charge, which is free to move, is placed inside S(a) It will remain in equilibrium(b) It can move inside S, but it cannot cross S(c) It must cross S at some time(d) It may move, but will ultimately return to its starting point

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Answer

(c) It must cross S at some time

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