What is the mathematical expression for Ohm's law?

Ohm's Law is a fundamental principle in electrical engineering that establishes the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. The mathematical expression is given by the formula V = IR, which indicates that the voltage across a conductor is directly proportional to the current flowing through it, with the resistance serving as the proportionality constant.

This relationship highlights how voltage and current interact in the presence of resistance. When you increase the current flowing through a resistor, the voltage across it also increases, assuming the resistance remains constant. Conversely, if the voltage increases and the resistance does not change, the current will also increase.

Understanding this relationship is crucial for analyzing circuits and predicting how changes in one parameter affect the others. This principle is foundational in both theoretical and practical applications in electrical engineering and is widely used in design, troubleshooting, and circuit analysis.