An `n-p-n` transistor power amplifier in `C-E` configuration gives.

In an n-p-n transistor

In an n-p-n transistor

Draw a circuit diagram of n-p-n transistor amplifier in CE configuration. Under what condition does the transistor act as an amplifier.

Draw the circuit diagram of an n-p-n transistor amplifier in common emitter configuration.

Consider an n-p-n transistor amplifier in common - emitter configuration. The current gain of the transistor is 100. If the collector current changes by 1 mA, what will be the change in emitter current?

With the help of neat circuit diagram obtain an expression for voltage gain of a transistor amplifier in C-E configuration.