What is the primary purpose of Ohm's Law in electrical circuits?

The primary purpose of Ohm's Law is to determine the relationship between voltage, current, and resistance in an electrical circuit. This law 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. This fundamental principle can be expressed with the formula ( V = I \times R ), where ( V ) represents voltage, ( I ) is current, and ( R ) is resistance.

Understanding this relationship is essential for analyzing how electrical circuits function. It allows engineers and technicians to predict how much current will flow when a certain voltage is applied and to understand how changing the resistance will affect the current. This knowledge is critical when designing circuits, troubleshooting electrical problems, and optimizing the performance of electrical systems.

The other choices do not accurately capture the primary aim of Ohm's Law. While measuring power, calculating energy consumed, or establishing frequency are relevant in electrical engineering, they do not directly pertain to the specific relationship that Ohm's Law describes between voltage, current, and resistance.