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JEE Main Physics question

PhysicsThermal Properties of MatterJEE Main

A steel wire of length 20 cm and uniform cross-section is tied rigidly at both ends. The temperature of the wire is altered from to . Coefficient of linear expansion of steel is and for steel is ; the tension in the wire is

Answer: (D)

Solution

Since the ends are fixed, cooling induces a tensile strain equal to .

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Question ID VK-154997