A 4-watt night light is plugged into a 120-volt circuit and operates continuously for a 30-day month. a. How much current does it draw? b. What is the resistance of its filament? c. How much energy does it use in the month? d. What is the cost of its operation for the month at the utility rate of 10 cents per kilowatt-hour?

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Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.