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A uniform copper rod of length 50 cm and...

A uniform copper rod of length 50 cm and diameter 3.0 mm is kept on a frictionless horizontal surface at `20^(@)C`. The coefficient of linear expansion of copper is `2.0 xx 10^(-5) K^(-1)` and Young's modulus is `1.2 xx 10^(11) N//m^(2)`. The copper rod is heated to `100^(@)C`, then the tension developed in the copper rod is

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