# 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 V = IR I = ${\displaystyle {\frac {V}{R}}}$ 0 Z = R
Capacitor C V = ${\displaystyle {\frac {1}{C}}\int Idt}$ I = ${\displaystyle C{\frac {dV}{dt}}}$ X = ${\displaystyle {\frac {1}{\omega C}}/_{-}90=}$${\displaystyle {\frac {1}{j\omega C}}}$ = ${\displaystyle {\frac {1}{sC}}}$ ${\displaystyle Z=R+X=R+{\frac {1}{j\omega C}}}$
Inductor L V = L ${\displaystyle {\frac {dI}{dt}}}$ I = ${\displaystyle {\frac {1}{L}}\int Vdt}$ X = ωL/_90 = jωL = 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