Question

    Two identical metallic spheres are charged. One has +Q

    charge, the other –Q charge. They are connected by a conducting wire. After equilibrium:
    A Both spheres will have zero potential Correct Answer Incorrect Answer
    B Both will have zero charge Correct Answer Incorrect Answer
    C Both will have same potential Correct Answer Incorrect Answer
    D Both will have same charge Correct Answer Incorrect Answer

    Solution

    When two conductors are connected by a wire, charges redistribute between them until they reach the same potential .

    • Here, the two spheres are identical (same radius, material), so the condition of same potential also implies equal charges eventually.
    • Initially, one sphere is +Q and the other −Q.
    • When connected, the total charge =+Q+(−Q)= 0, so after redistribution, the total charge must remain zero.
    Thus, both spheres will have the same potential after equilibrium, but their individual charges will adjust accordingly (and will not necessarily be zero individually unless specifically stated).

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