101.
Dissipation in a class B output device peaks at about ______ of full output.
Answer: A
It peaks at roughly two thirds of full swing, where the difference between what the supply delivers and what the load takes is greatest. At idle almost nothing flows and at full output most of the power reaches the load. That the worst thermal case is neither extreme is the single most useful fact for sizing a class B heatsink, and a bench test at full power alone will understate what is needed.
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