Electrical Engineering ⇒ Topic : Use of Power and Energy Formulas
Use of Power and Energy Formulas
It has already been discussed that electric power as well as electrical energy consumed can be expressed by three formulas. While using these formulas, the following points may be kept in mind.
The above formulas apply only to resistors and to devices (e.g. electric bulb, heater, electric kettle etc) where all electrical energy consumed is converted into heat.
(2) Electric power, P = VI watts
Electrical energy consumed, W = VIt joules
These formulas apply to any type of load including the one mentioned in point (i).
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