William Shockley, one of the inventors of the transistor, once explained transistor-amplifiers this way:
>*”If you take a bale of hay and tie it to the tail of a mule and then strike a match and set the bale of hay on fire, and if you then compare the energy expended shortly thereafter by the mule with the energy expended by yourself in the striking of the match, you will understand the concept of amplification.”*
which seems to describe the concept but not the process.
In: 6
How it fundamentally work require an explanation of semiconductors that are really not something you can put in a post here I would look at
https://www.youtube.com/watch?v=33vbFFFn04k and https://www.youtube.com/watch?v=DXvAlwMAxiA for a detailed explanation.
A simple transistor has three terminals. You control the current between two with a third. It is the current or voltage depending on the transistor model that controls the flow between the two other connectors.
So the transistor does not create a larger current it regulates the current from another source by the input. You can compare it to if you have a vale in a water pipe. If you have a vale that can be partially open you can control the flow rate as you can do with the taps of a sink.
You could design a valve that opens itself to different degrees depending on the water flow through another pipe. If you did you have something that functions as a transistor but with water.
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