Which equation is correct for potential difference (p.d.)?
- A$\text{p.d.} = \text{voltage} \times \text{current}$
- B$\text{p.d.} = \dfrac{\text{energy}}{\text{time}}$
- C$\text{p.d.} = \dfrac{\text{work done}}{\text{charge}}$
- D$\text{p.d.} = \dfrac{\text{current}}{\text{resistance}}$