The pressure that has to be applied to the end of a steel wire of length 10cm to keep its length constant when…..

Q: The pressure that has to be applied to the end of a steel wire of length 10cm to keep its length constant when its temperature is raised by 100°C is (for steel, Young’s modulus is 2 × 10¹¹ Nm^-2 and coefficient of thermal expansion is 11 × 10^-5 K^-1)

(a) 2.2 × 10⁸ Pa

(b) 2.2 × 10⁹ Pa

(c) 2.2 × 10⁷ Pa

(d) 2.2 × 10⁶ Pa

Ans: (a)