Discussion
Which stage arrangement gives a predictable gain of exactly ten?
Answer: C
Setting the collector resistor ten times the emitter resistor gives a gain of ten set by two resistors, holding across devices and temperatures - subject to a small correction for the intrinsic emitter resistance. Choosing an operating current would give the right answer only at one temperature, and the remaining options do not produce a gain of ten at all. A specification that reduces to a ratio of passive components is as reliable as those components, which is the whole appeal of feedback.
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