Potential difference and power — practice question

Which formula could be used to calculate power?

• A$\frac{(\text{current})^2}{\text{resistance}}$
• B$\frac{\text{force} \times \text{displacement}}{\text{time}}$
• C$\text{current} \times (\text{resistance})^2$
• D$\frac{\text{weight}}{\text{time}}$