Ohmtörvényt

Ohmtörvényt, commonly known as Ohm's Law, is a fundamental principle in electrical engineering that describes the relationship between voltage, current, and resistance in an electrical circuit. It was first formulated by the German physicist Georg Simon Ohm in the early 19th century.

The law states that the current through a conductor between two points is directly proportional to the voltage across the two points and inversely proportional to the resistance between them. Mathematically, this relationship is expressed as V = I * R, where V represents voltage, I represents current, and R represents resistance.

Voltage (V) is the electrical potential difference between two points and is measured in volts (V). Current (I) is the flow of electric charge and is measured in amperes (A). Resistance (R) is the opposition to the flow of electric current and is measured in ohms (Ω).

This simple equation allows for the calculation of any one of the three variables if the other two are known. For example, if the voltage across a resistor and its resistance are known, the current flowing through it can be determined. Conversely, if the current and resistance are known, the voltage drop across the resistor can be calculated. Ohm's Law is a cornerstone of circuit analysis and design, enabling engineers to understand, predict, and control the behavior of electrical systems. It applies to many simple electrical components, particularly resistors, under constant temperature conditions.