Physics
How does the resistance of a wire depend on it's length ? Give a reason for your answer.
Current Electricity
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Answer
Resistance of a wire is directly proportional to the length of the wire.
R ∝ l
In a long conductor, the number of collisions of free electrons with the positive ions will be more as compared to a shorter one. Therefore, a longer conductor offers more resistance. Hence, the resistance of a conductor is directly proportional to the length of the wire.
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