A semiconductor block carries a current of $30.0\,\text{mA}$ when the potential difference (p.d.) across it is $10.0\,\text{V}$. The block’s dimensions and the direction of current flow are shown. The electrical meters used have accuracies of $\pm 0.1\,\text{mA}$ and $\pm 0.1\,\text{V}$. The block dimensions are accurate to $\pm 0.2\,\text{mm}$. What is the resistivity of the semiconductor?
- A$10.0 \pm 0.2\,\Omega\,\text{m}$
- B$10.0 \pm 0.3\,\Omega\,\text{m}$
- C$10.0 \pm 0.5\,\Omega\,\text{m}$
- D$10.0 \pm 0.8\,\Omega\,\text{m}$