A resistor has resistance $R$. If the potential difference across the resistor is $V$, the current in the resistor is $I$. The power dissipated in the resistor is $P$. Work $W$ is done when charge $Q$ passes through the resistor. Which of the following is not a valid relationship between these variables?
- A$I = \frac{P}{V}$
- B$Q = \frac{W}{V}$
- C$R = \frac{P}{I^2}$
- D$R = \frac{V}{P}$