The annual electric bill for using this appliance to run the device for 2 hours a day for every day in a year is $9.64.
Electric power is the power or energy transmitted by an electric source or circuit per unit time.
The electric power if the product of voltage times current flowing in a circuit. It can be calculated with the following formula.
[tex]P=V\times I[/tex]
Here, (V) is the potential difference and (I) is the current.
The appliance requires 1.0 amps and runs off a standard ac 120 v outlets. Thus, the power required for the appliance is,
[tex]P=120\times1\\P=120\rm \; Watt[/tex]
The device is run for 2 hours a day for every day in a year. Thus the power required for whole year is,
[tex]P=120\times2\times365\\P=87600\rm \; Watt\\P=87.6\rm \; kW[/tex]
The electricity cost is 11.0 cents per kw-hr. The total cost for 87.6 kW electricity is,
[tex]C=87.6\times11\\C=963.6\rm\;cents\\C=9.636\rm\;dollar[/tex]
Thus, the annual electric bill for using this appliance to run the device for 2 hours a day for every day in a year is $9.64.
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