Problem:
1. An emitter follower, when driven from a 5-kΩ source, was found to have an output resistance Rout of 150Ω_.
The output resistance increased to 250Ω when the source resistance was increased to 10 kΩ. Find the overall voltage gain when the follower is driven by a 10-kΩ source and loaded by a 1-kΩ resistor.