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    Question

    The resistance of a wire is 10 Ω. What will be its

    resistance if its length is tripled? (Assume uniform cross-sectional area)
    A 20 Ω Correct Answer Incorrect Answer
    B 30 Ω Correct Answer Incorrect Answer
    C 40 Ω Correct Answer Incorrect Answer
    D 50 Ω Correct Answer Incorrect Answer

    Solution

    Resistance is directly proportional to length. New resistance = 3 × 10 = 30 Ω

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