When the length of a wire is doubled while keeping material and area of cross-section constant, what happens to its resistance?

Question

When the length of a wire is doubled while keeping material and area of cross-section constant, what happens to its resistance? — Exam MCQ

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B. The resistance becomes twice as much — Since R = ρL/A and material and area are unchanged, resistance is directly proportional to length. Doubling the length doubles R.

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A. The resistance becomes four times as much

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C. The resistance becomes half

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D. The resistance remains unchanged

When the length of a wire is doubled while keeping material and area of cross-section constant, what happens to its resistance?

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