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    Question

    What happens to the resistance of a wire if its length

    is doubled?┬а┬а
    A Doubles Correct Answer Incorrect Answer
    B Halves Correct Answer Incorrect Answer
    C Becomes four times Correct Answer Incorrect Answer
    D Remains same Correct Answer Incorrect Answer

    Solution

    Resistance R тИЭ L, where L = length of the wire.┬а┬а Doubling the length doubles the resistance (assuming area and material same).┬а┬а This is used in designing electrical circuits.┬а┬а Thinner and longer wires have more resistance.

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