Elementary electrician knowledge

Elementary electrician knowledge

What is a circuit? The circuit is the path for the flow of current (just like the water flow requires a river, the circuit is equivalent to the river, the current is equivalent to the river water), its role is to transmit and distribute electrical energy, and make electrical energy and other forms of energy mutual conversion (such as electrical energy Converted into heat energy to boil water or heat, etc.).

The composition of the circuit

The circuit is mainly composed of the following three parts:

Power supply: It is an indispensable device for outputting electric energy in a circuit, and the circuit cannot work without it. Usually dry batteries, solar cells, generators, etc., in the studio, they can convert chemical energy, mechanical energy, light energy and other energy into electrical energy.

Load: The load is also an indispensable basic component of the circuit, usually called electrical equipment, such as electric lights, motors, electric kettles, televisions, etc., which can convert electrical energy into light energy, heat energy, and mechanical energy.

Connecting wire: used to transmit and distribute electric energy, without it, a circuit cannot be formed, and the switch is also attributed to the wire.

The above is the most basic circuit of direct current. There are often many auxiliary devices in the circuit in actual use, such as various controls (such as controlling the volume of the earphone through a variable resistance), protection (such as automatic short-circuit trip), measurement (such as ammeter) and other equipment. Some tutorials may also include In addition, there is a fourth item of "auxiliary equipment". Switches, controls and other equipment are classified here.