Question: What is the typical configuration of a common emitter BJT amplifier?

Options:

1. Input at collector, output at emitter
2. Input at base, output at collector
3. Input at emitter, output at base
4. Input at collector, output at base

Correct Answer: Input at base, output at collector

Solution:

In a common emitter configuration, the input signal is applied to the base and the output is taken from the collector, providing voltage gain.