National League for Nursing (NLN PAX) Practice Exam

The relationship between voltage, current, and resistance in an electrical circuit is known as Ohm's Law. This fundamental principle states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance of the conductor. Formally, it can be expressed by the equation \( V = I \times R \), where \( V \) is voltage, \( I \) is current, and \( R \) is resistance. This law is critical for understanding how electrical circuits operate and forms the foundation for more complex circuit analysis and design.

In contrast, Kirchhoff's Law pertains to the conservation of charge and energy in electrical circuits, addressing how current behaves at junctions and how voltage drops across components in a circuit. Faraday's Law relates to electromagnetic induction and how a change in magnetic field can induce an electrical current, while Coulomb's Law describes the force between two charged objects. These principles are important in their own right, but they do not specifically define the relationship between voltage, current, and resistance as Ohm's Law does.