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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 $\;100^{0}C\;$ : (For steel Young's modulus is $\;2 \times 10^{11} Nm^{-2}\;$ and coefficient of thermal expansion $\;1.1 \times 10^{-5} K^{-1}\;$)

$(a)\;2.2 \times 10^{8}\;Pa \qquad(b)\; 2.2 \times 10^{9}\;Pa \qquad(c)\;2.2 \times 10^{7}\;Pa \qquad(d)\;2.2 \times 10^{6}\;Pa $

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