What is the formula to calculate power when given voltage and current?

The formula to calculate power in an electrical circuit when voltage and current are given is expressed as power (P) being the product of voltage (V) and current (I): P = V x I. This relationship is fundamental in electrical engineering and helps to quantify the rate at which electrical energy is converted to other forms of energy, such as heat or mechanical energy.

In a circuit, voltage represents the electrical potential difference, while current signifies the flow of electric charge. By multiplying these two quantities, you can determine the total power consumption or generation in watts (W), which is the standard unit for measuring power. This formula highlights the direct relationship between voltage, current, and power. When either voltage or current increases, assuming the other remains constant, the power will correspondingly increase.

Understanding this formula is essential for designing, analyzing, and troubleshooting electrical systems, as it provides insights into how effectively energy is being utilized within a circuit.