For a resistor with resistance $R$, the power $P$ lost as heat is found from $P = \frac{V^2}{R}$, where $V$ represents the potential difference (p.d.) across the resistor. The percentage uncertainty in $V$ is $5\%$ and the percentage uncertainty in $R$ is $2\%$. What is the percentage uncertainty in $P$?
- A$3\%$
- B$7\%$
- C$8\%$
- D$12\%$