Ohm's Law Calculator
Calculate voltage, current, resistance, and power in electrical circuits
Ohm's Law Calculator - Calculate Voltage, Current, Resistance, and Power
Ohm's 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.
Ohm's Law is a fundamental principle in electrical engineering that defines the relationship between voltage, current, and resistance in an electrical circuit. It 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.
The mathematical relationships in Ohm's Law can be expressed in several ways:
These formulas allow engineers to calculate any one of these values if the other two are known.
Ohm's Law is used in various electrical and electronic applications:
What is Ohm's Law? Ohm's 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.
Who discovered Ohm's Law? Ohm's Law was named after German physicist Georg Ohm, who published his findings in 1827.
Does Ohm's Law apply to all materials? No, Ohm's Law applies only to ohmic materials, which have constant resistance regardless of voltage or current. Non-ohmic materials (like diodes) do not follow Ohm's Law.
How is power related to Ohm's Law? Electrical power (P) can be calculated using variations of Ohm's Law: P = V × I, P = I² × R, or P = V² ÷ R.