Does this help?How much electronics do you know? Before you try to understand transistors, you need to at least know Ohm's Law and Kirchhoff's Laws.If you were studying electronics in school, you'd have a semester of DC curcuits, and a semester AC circuits before you start learning about transistors, MOSFETs or other active devices.
How do you get this to work the OP didn't even tell what transistor he was having problems with.
I cannot get how a transistor work.
I got my hands on one and it was a big power transistor
Many people have found this to be useful:-http://www.kpsec.freeuk.com/trancirc.htm
Anyone explain how current is amplified in a NPN transistor?We could take this question literally. Since a junction transistor is a quantum phenomenon:Time-dependent Schrödinger equation (single non-relativistic particle)Anyway, that's how college professors tend to answer questions
Why the five times?