This fundamental relationship in electrical circuit theory defines the ratio between voltage, current, and resistance. It states that the electric current flowing through a conductor is directly proportional to the voltage applied across its terminals and inversely proportional to the resistance offered by the conductor. Mathematically, this relationship is often represented by the product of voltage divided by current equaling the resistance. Understanding this relationship is crucial for the design and analysis of electrical systems, as it allows engineers to predict the required voltage to achieve a specific current through a known resistance, thereby forming a core principle in circuit analysis.