2.1 Introduction to electronics

• Electronics is the study of electricity (the flow of electrons) and how to use that to build things like computers. It uses circuits that are made with parts called components and connecting wires to do useful things  and convert them into electric current and voltage signals. 
• Electronic is used in our daily routine.Our family car has many electronic components, as does our cooking stove, laptop and cell phone, mobile phones to take and send pictures, videos, and to play music.
• Electronics is used in many applications such as telephony and telegraphy, optical communication, wireless communication, television communication.
• Electronics  has three categories:
   

                        * Input

                        *Processes

                       *Output

•  Their primary function is to enhance the learning experience for both students and teachers through the use of computers and other electronic devices.