question_answer

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\[{{100}^{0}}C\,(in\times {{10}^{8}}pa)\]is ______. (For steel Young's modulus is \[2\times {{10}^{11}}N{{m}^{-2}}\] and coefficient of thermal expansion is \[1.1\times {{10}^{-5}}{{K}^{-1}}\])

Answer:

2.2