Transistors are present almost every electronic equipment that you come across in your day to day life There are nearly 100 million transistors in a mobile phone and nearly over 1 billion transistors are present on a laptop or a personal computer in this article, we will be dealing with the following topics what is transistor science of semiconductors n-type doping p-type doping working of a transistor transistor as a switch transistor as an amplifier What is transistor Transistors in its simplest form can be thought off as a switch with special features The mechanical switch can control the flow of electric current and can be turned on and off Likewise, the same thing can be done with a transistor Unlike a mechanical switch, a transistor does not have any moving parts, does not need any human operator and can operate at a very fast rate Transistors are do all this because of the advancements in the science of semiconductors Science o...