If the ratio of stress to strain is the Young’s modulus of a material, how is the tension in a wire related to its extension?
Correct answer A. Directly proportional to extension
Explanation
Young's modulus Y = (F/A)/(ΔL/L) is constant within the elastic limit, so F = (YA/L)ΔL; the tension is therefore directly proportional to the extension, as Hooke's law states.
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