Which of the following describes the relationship between voltage, current, and resistance?

The correct answer, which states that voltage (V) equals current (I) multiplied by resistance (R), is a direct application of Ohm's Law. Ohm’s Law is a fundamental principle in electrical engineering and electronics that illustrates how voltage, current, and resistance interrelate within an electrical circuit.

In this relationship, voltage is the electrical potential difference that drives current through a circuit. Current refers to the flow of electric charge, and resistance is a measure of how much this flow is opposed within a circuit. By expressing voltage as the product of current and resistance, this formula enables the calculation of one of these variables if the other two are known.

Understanding this relationship is crucial for analyzing and designing electrical circuits, as it allows engineers to predict how changing one element affects the others. For instance, increasing the resistance in a circuit can lead to a decrease in current if the voltage remains constant, which is fundamental in designing safe and efficient electrical systems.