Single-phase Resistors

A resistor converts electrical power to heat. The voltage across and the current through a resistor ($v$ and $i$, respectively) are related by the equation, $v\=iR$, where $R$ is the resistance. A conductor with conductance $G$ is equivalent to a resistor with resistance $1/G$.

Conductor - ideal linear electrical conductor

Potentiometer - adjustable resistor with tap

Resistor - ideal linear electrical resistor

Variable Conductor - ideal linear electrical conductor with variable conductance

Variable Resistor - ideal linear electrical resistor with variable resistance