What defines Ohm's Law?

Study for the NCEA Level 3 Electricity Test. Explore multiple choice questions, each complete with hints and explanations. Prepare and excel in your exam!

Ohm's Law is a fundamental principle in electrical engineering and physics that defines the relationship between voltage, current, and resistance in an electrical circuit. The formula can typically be expressed as voltage equals current multiplied by resistance (V = I × R), which captures the essence of the relationship.

In this context, the correct answer suggests that both current being equal to voltage divided by resistance and resistance being equal to voltage divided by current are also correct interpretations of Ohm's Law, depending on how the equation is rearranged.

To clarify, the formula can be manipulated in different ways:

  • From V = I × R, you can express current as I = V/R, which states that current is the voltage divided by resistance.

  • Similarly, rearranging the formula to solve for resistance gives you R = V/I, meaning that resistance is the voltage divided by the current.

Thus, the identification of both these rearrangements as correct shows the flexibility and applicability of Ohm's Law in various contexts, leading to the conclusion that the response identifying both variations as correct is comprehensive and valid. This deeper understanding of the formula facilitates problem-solving in circuits and enhances the comprehension of how electrical components interact.

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