Test Academy | A rod of iron of Young’s modulus Y= 2.0 x10¹¹ N / m² just fits the gap between two rigid supports 1m apart. If the rod is heated through 100°C the strain energy of the rod is (α =18 x 10⁻⁶ °C⁻¹ and area of cross-section A = 1 cm² ) 324 J, 32.4 J, 26.4J, 2640J

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A rod of iron of Young’s modulus Y= 2.0 x10¹¹ N / m² just fits the gap between two rigid supports 1m apart. If the rod is heated through 100°C the strain energy of the rod is (α =18 x 10⁻⁶ °C⁻¹ and area of cross-section A = 1 cm² )

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324 J
32.4 J
26.4J
2640J

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