What is the principle of ohm's law?

The principle of Ohm's Law states that the voltage across a conductor is directly proportional to the current flowing through it, assuming the temperature remains constant. This relationship is mathematically expressed as voltage equals current times resistance (V = I x R).

In this equation, V represents voltage, I represents current, and R represents resistance. This fundamental relationship illustrates how changes in any one of the variables will affect the others: increasing the voltage will increase the current if resistance remains constant, and increasing resistance will decrease the current if voltage is held constant.

The other options do not accurately reflect Ohm's Law. For example, one option suggests that resistance is calculated by dividing voltage by power, which is not applicable in the context of Ohm's Law. Another states that power equals current multiplied by resistance, which is a different relationship known as the power formula. Likewise, the option that suggests current equals voltage minus resistance misrepresents the fundamental relationship described by Ohm's Law. Thus, the correct formulation of V = I x R encapsulates the essential concept of how voltage, current, and resistance interact in electrical circuits.