Electronics refers to the flow of charge (usually moving electrons) through nonmetal conductors (mainly semiconductors), whereas electrical refers to the flow of charge through metal conductors.The study of semiconductor devices and related technology is considered a branch of physics whereas the design and construction of electronic circuits to solve practical problems come under electronics engineering.
Electronic engineering is a discipline dealing with the behavior and effects of electrons (as in electron tubes and transistors) and with electronic devices, systems, or equipment. The term now also covers a large part of electrical engineering degree courses.
Electronics Engineering is one of the largest and fastest growing industries. It covers a wide range of applications we use daily and which make our life easier and enjoyable such as Television, Radio, computer, telecommunication etc. They helps us to see, hear and communicate over vast distances and do things faster. Electronics has a major role in improving productivity in industries like oil, energy, agriculture and so many other important sectors of economy. In steel, petroleum and chemical industries it is the electronic devices that direct, control and test production processes. Health care industry depend on electronic instruments to perform chemical tests and to check body functions. The safety in transportation, factories and mines and in homes rely heavily on electronics. The uses are endless.
Electronic component is any physical entity in an electronic system whose intention is to affect the electrons or their associated fields in a desired manner consistent with the intended function of the electronic system. Components are generally intended to be connected together, usually by being soldered to a printed circuit board (PCB), to create an electronic circuit with a particular function (for example an amplifier, radio receiver, or oscillator). Components may be packaged singly or in more complex groups as integrated circuits. Some common electronic components are capacitors, resistors, diodes, transistors, thyristors, diacs, opto-electronic components like light emitting diodes, optron, laser etc...
