What is the formula for calculating electrical power?

The formula for calculating electrical power is derived from the relationship between voltage, current, and power in an electrical circuit. Power is defined as the rate at which electrical energy is transferred by an electric circuit. The correct formula, Power (P) = Voltage (V) × Current (I), demonstrates that power is calculated by multiplying the voltage across the circuit by the current flowing through it.

This relationship is fundamental in electrical engineering and HVACR applications because it helps in understanding how much energy is being consumed or used in a system at any given moment. When you know both the voltage and the current, you can easily calculate the power usage, which is essential for designing systems, sizing components, and ensuring efficiency.

In essence, power indicates how much work can be done by the electrical system over time, therefore enabling technicians to assess energy consumption, perform energy audits, and implement energy-saving measures appropriately.