Question

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

Answer 1

The circuit diagram of an n-p-n transistor amplifier in CE configuration is given.
The transistor behaves as an amplifier when the input circuit (emitter - base) is forward biased having low voltage $V_{BB}$ and the output circuit (collector - base) is reverse biased having high voltage $V_{CC}$.