Define commercial unit of energy. Derive relationship between this unit of energy and SI unit of energy. An electrical device of 500 W is used daily in a household for 10 hours. Calculate the energy consumed in the month of April.
Commercial unit of energy in 1 kWh.
One kilowatt-hour is the amount of energy consumed by an agent in one hour working at a constant rate of one kilowatt (i.e. at the rate of 1000 J in one second).
SI unit of energy is joule.
The energy consumed by device of power 500W for 30 days
E = P x t
