# Practical Electronics/Simplest Circuits

## R.L,C Components

Below is the summary of the three components R , L , and C

Components Symbol Voltage V Current I Reactance X Impedance Z
Resistor R ${\displaystyle V=IR}$ ${\displaystyle I={\frac {V}{R}}}$ 0 Z = R
Capacitor C ${\displaystyle V={\frac {1}{C}}\int Idt}$ ${\displaystyle I=C{\frac {dV}{dt}}}$ ${\displaystyle X={\frac {1}{\omega C}}/_{-}90={\frac {1}{j\omega C}}={\frac {1}{sC}}}$ ${\displaystyle Z=R+X=R+{\frac {1}{j\omega C}}}$
Inductor L ${\displaystyle V=L{\frac {dI}{dt}}}$ ${\displaystyle I={\frac {1}{L}}\int Vdt}$ ${\displaystyle X=\omega L/_{-}90=j\omega L=sL}$ ${\displaystyle Z=R+X=R+j\omega L}$

## Series Circuit

With three components R, L, C, connected in series we have the following circuits

## Parallel Circuit

With three components R, L, C, connected in parallel we have the following circuits