Notes
Electrical Energy and Power…
Electrical Energy and Power – The electrical energy produced in a conductor of resistance R, having current I in time t is = I2Rt = V2t/R.
SI unit of electrical energy is joule (J).
The electrical power is the electrical energy produced in unit time = I2R = V2/R = VI
Thus, the electrical power is the product of voltage and current.
Its SI unit is watt = J/s = watt (W)
Other units of power 1kW = 103 W, 1 HP = 746 W
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