Discussion
With \( R_{E} = 470 \ \Omega \) left unbypassed, that gain becomes about
Answer: D
The external resistance now dominates the denominator:
\[ A_{v} \approx -\frac{4700}{470+26} \approx -9.5 \]
so about -9.5, close to the simple ratio of ten. Nearly twenty times the gain has been traded for a figure set by two resistors, which will hold across devices and temperatures. Whether that trade is worth making depends entirely on how much gain the design has to spare.
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