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A computer monitor uses 2.0 a of current when it is plugged into a 120 v outlet. the monitor is never turned off. what is the yearly cost of operating the monitor if the cost of electricity is $0.12/kwh

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Yna9141
Power (P) is calculated by multiplying current (I) and voltage (V). This can be mathematically expressed as,
     
                              P = I x V

                              P = (2.0 A) x (120 V) 
                                 = 240 W

Converting 1 year to number of hours,
                  1 year x (365 days/1 year) x (24 hr / 1 day) 
                               = 8760 hours

Calculating for the cost of power,

                  Cost = (240 W) x (1 kW/1000 W) x ($0.12/kWh) x (8460 hours)
                      Cost = $203.04

Thus, the yearly cost of power is approximately $203.04. 

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