STANDARD Physics Young's Modulus MCQ Question
If the ratio of diameters, lengths and Young’s moduli of steel and brass wires shown in the figure are p, q and r respectively. Then the corresponding ratio of increase in their lengths would be
3q/5pr
5q/3pr
3q/5p
5q/3p
Correct Answer
Detailed Explanation
The increase in length is inversely proportional to the product of Young's modulus and the cross-sectional area. Given the ratios, the increase in length ratio is derived as 5q/3pr.
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