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    Question

    The storage battery of a car has an emf of 15 V. If the

    internal resistance of the battery is 0.5 Ω, what is the maximum current that can be drawn from the battery?
    A 35A Correct Answer Incorrect Answer
    B 20A Correct Answer Incorrect Answer
    C 30A Correct Answer Incorrect Answer
    D 25A Correct Answer Incorrect Answer

    Solution

    In the above question it is given that: Emf of the battery, E= 15V Internal resistance of the battery, r = 0.5 Ω Consider the maximum current drawn from the battery to be I. Therefore, using Ohm’s law, E = Ir => I = E/r => I = 15/0.5 => I = 30 A Clearly, the maximum current drawn from the given battery is 30A

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