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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > The pressure that has to be applied to the ends of a steel wire of length 10 cm to keep its length constant when its temperature is raised by 100∘C is : (For steel Young’s modulus is 2 × 10^11 Nm^−2 and coefficient of thermal expansion is 1.1 × 10^−5 K_1)

The pressure that has to be applied to the ends of a steel wire of length 10 cm to keep its length constant when its temperature is raised by 100∘C is : (For steel Young’s modulus is 2 × 10^11 Nm^−2 and coefficient of thermal expansion is 1.1 × 10^−5 K_1)

Find the maximum length of the wire made of this metal which may suspended without breaking. The breaking stress for a metal is 7.8 x 10^9 N/m^2. The density of the metal is 7800 kg m^-3. If g = 10 N Kg^-1