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_______are usually utilized to extract heat from a variety of heat generating bodies to a heat sink.

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_______are usually utilized to extract heat from a variety of heat generating bodies to a heat sink.

(a) square fins

(b) cylindrical fins

(c) cavities

(d) no option

This question was addressed to me in an internship interview.

The question is from Transistor Case and Heat Sinks in division Differential and Multistage Amplifiers of Electronic Devices & Circuits

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Best answer
Right choice is (c) cavities

Best explanation: Cavities (inverted fins) embedded in a heat source are the regions formed between adjacent fins that stand for the essential promoters of nucleate boiling or condensation. These cavities are usually utilized to extract heat from a variety of heat generating bodies to a heat sink.

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