Time domain
The relations between voltage and current for the classic dipoles (resistor, inductor, capacitor), in the time domain, are written:
, where (t) is the current flowing through the resistor and the voltage drop across the resistor.
, where (t) is the current flowing throught the inductor and the voltage drop across the inductor,
, where (t) is the current flowing through the capacitor and (t) the voltage drop across the capacitor.