A light bulb marked “73 W at 120 V” is screwed into a socket at one end of a long extension cord, in which each of the two conductors has resistance 0.7 Ω. The other end of the extension cord is plugged into a 120-V outlet. Find the actual power delivered to the light bulb in this circuit.
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.
A light bulb marked “73 W at 120 V” is screwed into a socket at one end of a long extension cord, in which each of the two conductors has resistance 0.7 Ω. The other end of the extension cord is plugged into a 120-V outlet. Find the actual power delivered to the light bulb in this circuit.
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