Discussion
What does an amplifier's damping factor describe?
Answer: D
Damping factor is the load impedance divided by the amplifier's own output impedance, so a figure of a hundred into eight ohms means an output impedance of eighty milliohms. Power ratio is gain, settling is a transient specification, and ripple attenuation is supply rejection. A high damping factor means the amplifier controls the loudspeaker's motion rather than letting it ring, and feedback is what makes such low output impedances achievable. Most errors here come from carrying a result across from a neighbouring case where it does not hold.
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