Electronics is a sub branch of physics which includes the study of electrons, flow of electrons in various devices like diode, resistance, capacitance etc. This flow of electrons is also known as charge. So the term 'electronics' involves all the study of flow of charge, various functions of the devices which use charge, machines which use electronic components and every thing which use electrons/charge for their working.
Electronics can be further categorized as:
Many other types of electronics also exist.
Actually the main term 'electronics' and its other sub branches deals with the circuits formed by using the electronic components like resister capacitor etc.
Story of electronics starts from 1880, It was Thomas
Alva Edison who observed the flow of current between
two elements in an evacuated glass tube while performing
an experiment. This was the first step of the electronics
era. After Edison's experiment, a lot of other successful
experiments were done by many other scientists including
John A. Fleming and Lee de Forest (1907).
There is not a very large variety in compressor designs. The following are the main types of compressors which are commonly used: