### Ohms Law Equation and Calculator

**Instrumentation and Electrical Design**

**Equation and Calculator Ohms Law.**

**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 usual mathematical equation that describes this relationship:

I = V / R

where:

*I *is the current through the conductor in units of amperes

*V *is the potential difference measured *across *the conductor in units of volts

*R *is the resistance of the conductor in units of ohms .

More specifically, Ohm's law states that the *R *in this relation is constant, independent of the current.