What is the relationship described by Ohm's law?

Ohm's law describes the fundamental relationship between voltage, current, and resistance in an electrical circuit. According to this law, the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor. This relationship can be expressed by the equation V = I × R.

Understanding this relationship is crucial in various applications of electrical engineering and building maintenance, because it helps in troubleshooting electrical issues, designing circuits, and ensuring that electrical systems operate safely and efficiently. By manipulating either voltage or resistance, one can predict how current will change in the system, making it a foundational principle in both theory and practical applications related to electrical infrastructure.