# Ohm's Law

**Ohm's Law** describes the relationship between current ($I$), voltage ($V$), and resistance ($R$), so that **current**, which is the flow of electricity, is defined as:

$I = V/R$

Given the values for any two variables, we solve for the third, so that **voltage**, electrical potential energy, is defined as:

$V = IR$

And **resistance**, which impedes the flow of electricity, is:

$R = V/I$

**Conductance** ($G$), which is the ability for a material to conduct electricity is defined as the inverse of resistance, and can therefore calculated by Ohm's Law as:

$G = I/V$

## Video: Circuits and Ohm's Law

## History

Ohm's Law is named after Georg Simon Ohm, who first derived the relationships now known as Ohm's Law.

## Deeper Knowledge on Ohm's Law

### Electrical Circuits

Ways of assembling electronic elements

## Broader Topics Related to Ohm's Law

### Conductance and Siemens

The ability to conduct to current, measured in siemens

### Current and Amperes

The flow of electricity, measured in amps

### Electricity

Energy that results from charged particles

### Resistance and Ohms

Opposition to current, measured in ohms

### Voltage and Volts

Electrical potential energy, measured in volts