The unit of electric energy is the watt hour (Wh). One watt hour is the energy consumed when 1 watt of power is used for 1 hour. The relationship between power, time, and electric energy is expressed by the formula: Electric Energy (Wh) = Power (W) × Time (h).
How is the unit of electric energy defined, and what is the relationship between power, time, and the unit of electric energy?
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The unit of electric energy is defined as the watt-hour (Wh), representing the consumption of one watt of power for one hour. This unit quantifies the total amount of work done or energy consumed. The relationship between power (P), time (t), and electric energy (E) is expressed as E = Pt. Power, measured in watts (W), multiplied by time in hours (h), gives the energy consumed in watt-hours. For larger quantities, kilowatt-hours (kWh) are commonly used. This relationship is fundamental in billing for electrical consumption, assessing device efficiency, and understanding the overall energy consumption of electrical systems.