Dear friends, Please support us at Patreon, so that we can continue our free educational service https://www.patreon.com/LearnEngineering The invention of transistors revolutionized human civilization like no other technology. This video demonstrates working of a Bipolar Junction Transistor (BJT) with it's practical applications such as transistor as an amplifier and as a switch with help of animation. Along with transistor working of diode is also explained in the video. The video covers following topics - structure of Silicon atom, doping, N type doping, P type doping, working of Diode, working of NPN transistor and dual stage amplification. Like us on FB : https://www.facebook.com/LearnEngineering Voice-over artist : https://www.fiverr.com/mikepaine