Physics

Problem

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^{\circ} \text{C}

is: (For steel Young's modulus is

2 \times 10^{11} \text{ Nm}^{-2}

and coefficient of thermal expansion is

1.1 \times 10^{-5} \text{ K}^{-1}

) a.

2.2 \times 10^8 \text{ Pa}

2.2 \times 10^9 \text{ Pa}

2.2 \times 10^7 \text{ Pa}

2.2 \times 10^6 \text{ Pa}