Define power. Write commercial unit and SI unit of electrical energy. An electrical geyser of 1.5 kW works for 2 hours. Find the electrical energy units consumed in a day


#1

Power is defined as the rate of doing work. The commercial unit of electrical energy is kW h and the SI unit is joule. .
Given P = 1.5 kW,
t = 2 hours,
E = P x t = ?
E = 1.5 x 2 = 3 kW h