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Heat dissipation from heat sink take place primarily by ___________

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Heat dissipation from heat sink take place primarily by ___________

(a) Conduction

(b) Convection

(c) Radiation

(d) All of the mentioned

I had been asked this question in an online interview.

I would like to ask this question from Heat Sink for Power Transistor-2 in chapter Power Amplifier of Analog Circuits

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Correct choice is (d) All of the mentioned

The best explanation: Heat dissipation from heat sink take place primarily by convection since there is no actual contact between heat sink and transistor. Heat dissipation also takes place by Radiation but it is comparatively low.

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