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-Two copper wires have the same volume,but wire 2 is 10% longer than wire 1.The ratio of the resistances of the two wires R₂/R₁ is

Question

Use the diagram below for the next problem:

-Two copper wires have the same volume,but wire 2 is 10% longer than wire 1.The ratio of the resistances of the two wires R₂/R₁ is

Quizplus · Accepted Answer

The resistance of a wire is proportional to its length and inversely proportional to its cross-sectional area. Since wire 2 is 10% longer, its cross-sectional area must be smaller to maintain the same volume. This results in a higher resistance, specifically 20% higher, making the ratio 1.2.

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