Question:
The pressure that has to be applied to the ends of a steel wire of length $10 \mathrm{~cm}$ to keep its length constant when its temperature is raised by $100^{\circ} \mathrm{C}$ is :
(For steel Young's modulus is $2 \times 10^{11} \mathrm{~N} \mathrm{~m}^{-2}$ and coefficient of thermal expansion is $1.1 \times 10^{-5} \mathrm{~K}^{-1}$ )
Correct Option: , 3
Solution:
