How do you calculate the energy consumed by an electrical device?

The energy consumed by an electrical device is calculated using the relationship between power and time. Power is defined as the rate at which energy is used or transferred, and it is measured in watts (W). When you multiply power (in watts) by the amount of time (in hours or seconds) that the device operates, you obtain the total energy consumed, typically expressed in watt-hours (Wh) or joules (J).

This relationship is foundational in electrical engineering and helps in understanding how much energy a device will use over a certain period, making it crucial for energy management and electricity cost calculations. Knowing the power rating of a device allows users to estimate operational costs and energy usage based on how long it is used. Thus, the formula Power x Time effectively gives the correct calculation for energy consumption.