Hi, I am a beginner in electronics and learning the basics of it.
I am confused about whether a transistor actually amplifies the current as the literal meaning of 'Amplify' is to increase and the current depends on the the voltage applied and the resistance of the material used.
So,does it somehow increase the voltage or reduce the resistance or both?If yes,then how?

Thank You

Do yourself a HUGE favor and buy a copy of "The Art of Electronics" by Horowitz and Hill. It will be the best investment in your own future and knowledge base. I know if no one that has ever purchased this book that has regretted it.

Link: https://www.amazon.com/Art-Electron...980475&sr=8-3&keywords=the+art+of+electronics

 

A second edition pdf is available online now.

Moderator edit: link to copyrighted material removed

 

I may be totally mistaken, but I find a photocopied version of ANY book posted online like this to be highly suspect. I sincerely doubt that the authors of the book or its publisher condone this. If I'm wrong, let it stand; if I'm correct, then the previous post should be deleted and anyone, including the poster, that downloads it should check their ethics. I may be a "New Member" and not have 2900+posts, but I do know the difference between right and wrong.

Buy the !@#$%^& book; your Karma will thank you.

 

I don't know all the legalities.......but I think that after a certain length of time......you may copy anything.

But you could be right. But I believe these are university sites........and should be legit.

But I'm no lawyer.

 

The people that run this site should know these things. Report my post.......and see if it's so. You might be right. I don't really know.....just trying to help. I paid a hefty price for my copy........and never used it that much.

 

Hello,

Here is an other water analogy for the transistor:

The closed transistor would be like this:

View attachment 134584

The transistor driven by base current:

View attachment 134585

Bertus

this is nice but terminals are marked wrong, E and C are swapped

 

Hello,

this is nice but terminals are marked wrong, E and C are swapped

Corrected.

Bertus

 

An amplifier level shifts the signal or in generally translates the input signal to a different level.