Electrical and Electronics are the branches in the field of engineering which are based on the principles of flow of charge through semiconductors and conductors respectively. Electronic components are assembled to form an electronic circuit to carry out a specific function. Capacitors, diodes, transistors etc are examples of electronic components. Electronic systems like computers and integrated circuits are inevitable part of our system. Electrical section is chiefly involved with electricity and electromagnetism. Now, a wide variety of technologies and devices work through the deployment of the principles of electrical science and electronics. The type of work of an engineer differs depending on the nature of device or the system he is working with.