What law defines the relationship between voltage, current, and resistance in a circuit?

Ohm's Law is fundamental in understanding the behavior of electrical circuits as it defines the direct relationship between voltage (V), current (I), and resistance (R). According to Ohm’s Law, the voltage across a conductor is proportional to the current flowing through it, provided the temperature remains constant. This can be mathematically represented as V = I × R, where V represents voltage in volts, I represents current in amperes, and R represents resistance in ohms.

This law is crucial in designing and analyzing circuits because it allows engineers and technicians to calculate how much current will flow for a given voltage and resistance, which is vital for determining safety and functionality in electrical systems. Understanding this relationship forms the backbone of circuit analysis and helps predict how changes in resistance or voltage will affect current flow, making it an essential principle in the study of electricity.