It amplifies current and voltage from other transistors and outputs go to inputs respectively and the gain increases and eventually to the speaker output, or whatever its used for.
In forward active mode, transistor can amplify current and/or voltage signals. So here, it can be used as an amplifier. To understand this read as follows... There are four mode of operations for a...
The question should be like: How can a transistor be used as an amplifier...?? Answer: There are four mode of operations for a transisitor. 1. Forward active mode. 2. Reverse active mode. 3. Cut Off...
Depends on the type of amplifier. There are a lot of different circuits of amplifiers and each one of them use proper transistors, that works better for that circuit. Moreover, on every stage of the...