Practical Electronics/Switches

Switch
Switches is a mechanical tool used in electronics to open or close a circuit. Many of switches requires mechanical forces to operates them. There are 3 types of switches that is
 * (i) Push Switch
 * (ii) Toggle Switch
 * (iii) Slide Switch

Switch Operation
A switch that is switched 'on' / 'closed' allows current to passed thru meanwhile a switch that is switched 'off' / 'opened' stops current from passing thru it.
 * Opened Switch, I ≠ 0 . Circuit is closed
 * Closed Switch, I = 0 . Circuit is opened

Types of Switch
There are 4 main types of switches that are shown in table below: As you noticed, there are 2 re-occuring termsn namely: Pole and Throw.

A Pole simply means how many circuits the switch controls. Single Pole controls one circuit with one switch, Double Pole controls two separate circuits with one switch.

A Throw simply refers to how many ON positions the switch has. Single Throw have one ON position, Double Throw have two ON position