

Ohm's law states that the current through a
conductor between two points is directly proportional to the potential
difference across the two points. Introducing the constant of
proportionality, the resistance, one arrives at the mathematical
equation that describes this relationship.
V = I x R (Voltage = Current multiplied by Resistance)
R = V / I (Resistance = Voltage divided by Current)
I = V / R (Current = Voltage Divided by Resistance)
Knowing any two of the values of a circuit, one can calculate the third,
using Ohm's Law.
