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    Question

    For a cell terminal potential difference is 3.5 V when

    circuit is open and reduces to 2.5 V when cell is connected to a resistance of R = 10Ω then determine internal resistance of cell is
    A 4 ╬й Correct Answer Incorrect Answer
    B 2 ╬й Correct Answer Incorrect Answer
    C 6 ╬й Correct Answer Incorrect Answer
    D 3 ╬й Correct Answer Incorrect Answer

    Solution

    2.5 = (3.5 × 10)/(10 + r) r = 4 Ω

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