The figure represents the extension $(\Delta l)$ of a wire of length $1\text{ m}$, suspended from the ceiling of a room at one end with a load $W$ connected to the other end. If the cross-sectional area of the wire is $10^{-5}\text{ m}^2$, then the Young's modulus of the wire is . . . . . . $\text{N/m}^2$.
- A$1.0 \times 10^{11}$
- B$2.0 \times 10^{10}$
- C$1.0 \times 10^{10}$
- D$2.0 \times 10^{11}$
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