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Active heat sinks are less durable than passive heat sink because of the presents of __________

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Active heat sinks are less durable than passive heat sink because of the presents of __________

(a) Complex electrical network

(b) Non-metal components

(c) Metal components

(d) Moving components

I got this question in an interview.

This question is from Heat Sink for Power Transistor-1 topic in section Power Amplifier of Analog Circuits

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Correct choice is (c) Metal components

For explanation: Active heat sink include moving components and hence it should be periodically serviced.

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