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A steel wire of length L at 40°C is suspended from the ceiling and carries a mass m from its free end. The wire is cooled from 40°C to 30°C to regain its original length L. The coefficient of linear expansion is 10⁻⁵/°C, Young’s modulus of steel is 10¹¹ N m⁻², and the radius of the wire is 1 mm. The value of m in kg is nearly
A steel wire of length L at 40°C is suspended from the ceiling and carries a mass m from its free end. The wire is cooled from 40°C to 30°C to regain its original length L. The coefficient of linear expansion is 10⁻⁵/°C, Young’s modulus of steel is 10¹¹ N m⁻², and the radius of the wire is 1 mm. The value of m in kg is nearly
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Prevented thermal expansion produces stress: σ = YαΔ T.
Updated On: Mar 23, 2026
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The Correct Option is C
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