How is power in watts calculated?

Power in watts is calculated using the formula that states power equals voltage multiplied by current. This relationship is foundational in electricity and is derived from Ohm's Law, which connects voltage, current, and resistance. Power (P) represents the rate at which electrical energy is transferred or converted, and when you multiply voltage (V) — the potential difference — by current (I) — the flow of electric charge — you obtain the total power in watts.

In practical terms, this means that if you know the voltage supplied to a circuit and the current flowing through it, you can easily determine how much power is being consumed or delivered in watts. This concept is essential for understanding how electrical systems function, particularly in the context of aircraft electronics, where accurate power calculations are crucial for ensuring systems operate efficiently and safely.