Survey of Electronics

Electronics, radio, and television are practical applications of general principles of electricity. The same electric current produced by battery for a flaslight can also be used in man different ways. Some examples are running a mtor producing heat and light for electric power applications, while electronic calculators and computers illustrate more advanced applications in digital electronics. In addition, radio and television are considered as communications electronics. They all are basedon the fundametal laws of electricity and magnetism. Magnetic effects are always associated with an electric current.

The name electronics comes from the electron, which is very small, invisible quantity of electricity present in all materials. In terms of its many uses, electronics can be defined to include all aplications involving the control of electricity in a vacuum, such as vacuum tubes, in gas or vapor, and in the solid semiconductor materials used for transistor and integrated circuits. The main in their operation is control of individual electrons for desired effect.In a transistor, as an example, tthe input can control a larger output current, to provide amplification. The Integrated-Circuit (IC) contains many transistor on a small semiconductor chip.