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    In order to achieve maximum heat dissipation, the fin should be designed in such a way that
    Question

    In order to achieve maximum heat dissipation, the fin should be designed in such a way that

    A.

    It should have maximum lateral surface at the root side of the fin

    B.

    It should have minimum lateral surface near centre of the fin

    C.

    It should have maximum lateral surface towards the tip side of the fin

    D.

    It should have maximum lateral surface near the centre of the fin

    Correct option is A

    heat flux from a fin’s surface is proportional to the local temperature difference between the fin surface and the ambient. For a typical fin the temperature falls from the base (root) toward the tip, so the largest local temperature (and therefore the largest local heat flux per unit area) occurs near the root. Placing more lateral surface area where the local driving temperature is greatest (near the root) yields more total heat transfer for a given fin volume or material.

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