$A$ wire of length $2 \ m$ and cross-sectional area $10^{-2} \ cm^2$ is fixed at one end. $A$ force of $200 \ N$ is applied at the other end. The coefficient of linear expansion of the wire is $1.1 \times 10^{-5} \ ^oC^{-1}$ and the Young's modulus is $1.2 \times 10^{11} \ N/m^2$. If the temperature is increased by $10^oC$,what will be the thermal stress developed in the wire?

  • A
    $1.32 \times 10^7 \ N/m^2$
  • B
    $1.10 \times 10^{15} \ N/m^2$
  • C
    $1.32 \times 10^8 \ N/m^2$
  • D
    $1.10 \times 10^6 \ N/m^2$

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