Power using current and resistance:

\[ P = I^2 \cdot R \]

Power using voltage and resistance:

\[ P = \frac{V^2}{R} \]

Where:

• \(P\) is the power in Watts (W).
• \(I\) is the current in Amperes (A).
• \(V\) is the voltage in Volts (V).
• \(R\) is the resistance in Ohms (Ω).