The resistance $R$ of a resistor is to be found. The current $I$ through the resistor and the potential difference $V$ across it are recorded. The readings, together with their uncertainties, are $I = (2.0 \pm 0.2)\,\text{A}$ and $V = (15.0 \pm 0.5)\,\text{V}$. The value of $R$ is worked out as $7.5\,\Omega$. What is the uncertainty in this value for $R$?
- A$\pm 0.3\,\Omega$
- B$\pm 0.5\,\Omega$
- C$\pm 0.7\,\Omega$
- D$\pm 1\,\Omega$