Discussion
Why is the reverse voltage ratio usually neglected in hand analysis?
Answer: B
The reverse ratio is a few ten-thousandths, so the error from ignoring it is far smaller than the spread in beta and the tolerance of the resistors. It is measurable, does not vanish with bypassing, and applies at all frequencies. Neglecting a term because it is small compared with the uncertainties already present is legitimate, and stating that comparison is what distinguishes a justified approximation from a careless one.
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