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# Electronics

## Resistor

The easiest component to start with is the resistor.

Resistors have many usage:

❝In electronic circuits, resistors are used to reduce current flow, adjust signal levels, divide voltages, bias active elements, and terminate transmission lines, among other uses. High-power resistors that can dissipate many watts of electrical power as heat [...] or as test loads for generators. Fixed resistors have resistances that only change slightly with temperature, time or operating voltage. Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity.❞ Wikipedia: Resistor

## RLC Impedance

Impedance (Ω) | Low Frequency | Medium Frequency | High Frequency |

Resistance, R | Doesn't depend on frequency |

Inductive Reactance
\$X_L = 2\pi f L\$ | Low | Medium | High |

Capacitive Reactance
\$X_C = \frac{1}{2\pi f C}\$ | High | Medium | Low |

## RLC Addition

| Series | Parallel |

Resistor, R [Ω] |
| |

\$R = R_1 + R_2\$ | \$\frac{1}{R} = \frac{1}{R_1} + \frac{1}{R_2}\$ |

Inductor, L [H] |
| |

\$L = L_1 + L_2\$ | \$\frac{1}{L} = \frac{1}{L_1} + \frac{1}{L_2}\$ |

Capacitor, C [F] |
| |

\$\frac{1}{C} =\frac{1}{C_1} + \frac{1}{C_2}\$ | \$C = C_1 + C_2\$ |

# Questions