Ohm's Law is a fundamental principle in electrical engineering and physics, named after the German physicist Georg Simon Ohm, who formulated it in the early 19th century. It describes the relationship between voltage (V), current (I), and resistance (R) in an electrical circuit. The 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.
Mathematically, Ohm's Law is expressed as:
V = I * R
Where:
V is the voltage measured in volts (V).
I is the current measured in amperes (A).
R is the resistance measured in ohms (Ω).
This formula shows that if you know any two of the three variables (voltage, current, or resistance), you can calculate the third. Ohm's Law is crucial for understanding and analyzing electrical circuits, as it allows engineers and technicians to determine how different elements in a circuit, such as resistors, conductors, and loads, interact with each other in terms of voltage, current, and resistance.