Question 45 of 126

The pressure that has to be applied to the ends of a steel wire of length $10cm$ to keep its length constant when its temperature is raised by $100^{\circ}C$ is :
(For steel, Young's modulus is $2\times {10}^{11}N{m}^{-2}$ and coefficient of thermal expansion is $1.1\times {10}^{-5}{K}^{-1}$)