New RBI Grade B 2025 Notification will come Soon! Enroll Here

    Question

    If a copper wire is increased to double its length, its

    resistance will become –
    A four times Correct Answer Incorrect Answer
    B one-fourth Correct Answer Incorrect Answer
    C double Correct Answer Incorrect Answer
    D half Correct Answer Incorrect Answer

    Solution

    There is a direct relationship between the amount of resistance encountered by charge and the length of wire it must traverse. After all, if resistance occurs as the result of collisions between charge carriers and the atoms of the wire, then there is likely to be more collisions in a longer wire.

    Practice Next