4.22 dollars is the cost to leave the bulb on for 30 days.
Electrical energy is the power an atom's charged particles have to cause an action or move an object. The movement of electrons from one atom to another is what results in electrical energy.
There is a dissipation of electrical energy in the resistor when an electric current flows through it. It depends on the resistance of the resistor and the applied voltage.
The expression of the power dissipation is as follows ;
P=[tex]\frac{V^2}{R}[/tex]
V is the applied voltage.
R is the resistance.
Given
P = 60 W
30days * 24h/day = 720 Hours kW * h
Therefore by putting the values in the given formula,
= (60/1000)kW * 720h
= 43.2 kWh
Hence,
The cost is 42.2 kWh42.2 kWh x 0.1
= 4.22 dollars
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