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Postby TGTS0907129» Unit and cost of electric energy

Describe the unit and cost of electric energy

1-

A very practical aspect of the use of any electric devices is the cost of its operation. It should be noted that the thing for which the consumer pays the utility company is energy and not power.
                      
Energy = power × time

A power of 1 W used for 1 s requires 1 J of energy. This is a rather small unit for general use. The most common unit is the kilowatt-hour (k WH), which is the energy consumed when 1 kW of power is used for 1 h. once kilowatt-hour is equal to 3.6 × 106 J.

The cost of electric energy is given by the equation
          
Cost = P × t × (unit cost)
                   


when V is expressed in volts, I in amperes, and t in hours.
 

By TGTT30071258 on 10/26/2015 2:55:26 AM
TGTS0907129 on 10/26/2015 12:40:18 AM
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