A steel wire of uniform cross- section of $2\;mm^2$ is heated upto $50^{\circ}$ and clamped rigidly at two ends. If the temperature of wire falls to $30^{\circ}$ then change in tension in wire will be , if coefficient of linear expansion of steel is $1.1 \times 10^{-5}/ ^{\circ} C$ and $Y=2 \times 10^{11} N/m^2$

Question

\[\begin {array} {1 1} (a)\;44\;N \\ (b)\;88\;N \\ (c)\;132\;N\\ (d)\;22\;N \end {array}\]