Ohm's Law is a fundamental principle in electrical engineering and physics that describes the relationship between voltage, current, and resistance in an electrical circuit. It is named after the German physicist Georg Simon Ohm, who formulated it in the 1820s.
Ohm's Law is mathematically expressed as:
V = I * R
Where:
V is the voltage across the circuit (measured in volts, V).
I is the current flowing through the circuit (measured in amperes, A).
R is the resistance of the circuit (measured in ohms, Ω).
According to Ohm's Law, the voltage across a circuit is directly proportional to the current passing through it, and this relationship is inversely proportional to the resistance of the circuit. In other words:
If the voltage (V) increases while the resistance (R) remains constant, the current (I) will increase.
If the resistance (R) increases while the voltage (V) remains constant, the current (I) will decrease.
Ohm's Law is particularly useful in analyzing and designing electrical circuits, as it helps engineers and scientists understand how voltage, current, and resistance interact with each other. This law forms the foundation for many electrical applications and calculations.