What is the relationship expressed by the equation R=V/I?

The equation ( R = \frac{V}{I} ) represents Ohm's Law, which defines the relationship between resistance (R), voltage (V), and current (I) in an electrical circuit. According to Ohm's Law, the resistance in a circuit is equal to the voltage across the circuit divided by the current flowing through it. This fundamental principle is crucial for understanding how electrical components behave in both simple and complex circuits, facilitating the analysis and design of electrical systems.

In the context of circuit design and analysis, understanding this relationship allows engineers to calculate how much resistance a material offers to the flow of current, determining how much voltage is necessary to achieve a desired current level.

The other options relate to different principles in physics and engineering. The Work Energy Principle pertains to the relationship between work done on an object and its energy changes. Bernoulli's Equation describes the conservation of energy in fluid flow, while Newton's Second Law deals with the relationship between an object's mass, its acceleration, and the net force acting on it. Each of these concepts is important in its own right but does not pertain to the specific relationship expressed by the equation ( R = \frac{V}{I} ).