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The adjacent graph shows the extension $(\Delta l)$ of a wire of length $1\, m$ suspended from the top of a roof at one end and with a load $W$   connected to the other end. If the cross-sectional area of the wire is $10^{-6}\, m^2$, calculate the Young’s modulus of the material of the wire.
  • A$2\times10^{11}\, N/m^2$
  • B$2\times10^{-11}\, N/m^2$
  • C$3\times10^{-12}\, N/m^2$
  • D$2\times10^{-13}\, N/m^2$
AIIMS 2008, Medium
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