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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A steel wire of length 4.7 m and cross-sectional area 3 × 10^−6 m^2 stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4 × 10^−6 m^2 under a given load. The ratio of Young’s modulus of steel to that of copper is

A steel wire of length 4.7 m and cross-sectional area 3 × 10^−6 m^2 stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4 × 10^−6 m^2 under a given load. The ratio of Young’s modulus of steel to that of copper is

A thick rope of density ρ and length L is hung from a rigid support. The increase in length of the rope due to its own weight is (Y is the Young's modulus)