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 N m –2 and coefficient of thermal expansion is 1.1 × 10 –5 K –1 )
Text Solution
Verified by ExpertsThe correct answer is:
A
= Y
P = Y αΔθ = 2 × 10 11 × 1.1 × 10 –5 × 100
= 2.2 × 10 8 Pa
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