How Transistors work ? | How it works ?

The transistor is one of the most important devices ever invented. They revolutionized human civilization like no other technology. Consider a smartphone, laptop, super computer, or any other processing device, at the heart; their processor holds billions of transistors. Let's see what is a transistor is? And How it works?
#HowItWorks #HowTransistorWorks #Transistor #BJT