According to Ohm's law, how is resistance calculated?

Ohm's law defines the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. The law states that the voltage across a conductor is directly proportional to the current flowing through it, with the resistance being the constant of proportionality. The correct formula for calculating resistance derived from Ohm's law is R = V / I.

This means that resistance (R) can be found by dividing the voltage (V) across an electrical component by the current (I) flowing through it. This relationship allows for the determination of how much opposition a material provides to the flow of electric current, which is essential in electrical and utility applications.

Other formulas presented in the options do not represent the relationship defined by Ohm’s law accurately. For instance, adding current and voltage does not yield resistance, nor does dividing current by voltage or multiplying current by voltage. Understanding this fundamental concept is crucial for anyone working in electrical fields, especially in utility arborist roles where managing electrical systems around tree placements is necessary.