 # Ohm's Law: Explain The Relationship Between Electric Current, Voltage, And Resistance

Ohm’s law is the basic rule of the electricity that explains the relationship between electric current, voltage, and resistance. The ohm’s law was named after the German physicist Georg Ohm who discovered this rule or law.

Ohm’s law statement

Ohm’s law states that the electric current flowing through a conductor is directly proportional to the voltage and inversely proportional to the resistance. In other words, the electric current flowing through the conductor increases with increase in applied voltage (If resistance is not changed) and the electric current flowing through the conductor decreases with increase in resistance of conductor (If voltage is not changed).

Ohm’s law is mathematically written as

Ohms law equation is mathematically
Electric current is measured in amperes (A).

Voltage: The difference in electric potential energy of charged particles between two points within the electric field is called voltage. The free electrons at the higher potential have more electrical potential energy whereas the free electrons at lower potential have less electrical potential energy. Voltage is measured in volts (V).

Resistance: Resistance is the opposite force that resists the flow of electrons. The electrons that are moving freely through the conductor will collide continuously with the atoms. This causes the free electrons to lose their energy. Hence, the electric current decreases. Resistance is measured in ohm’s(Ω)

Ohm’s law explanation with an example

The concept of ohm’s law is easily understood with the water analogy. The difference in water pressure between two points in a tank causes the water flow. Here, the difference in the water pressure is compared with voltage. The rate at which water flows per second is compared with electric current. The obstacle that decreases the water flow is compared with