Question

A heat sink is a small ceramic or metal component with fins on its surface that absorbs and disperses heat produced by electrical components such as a processor.

a) true
b) false

Answer 1

True

Step-by-step explanation:

The reason for heat transfer from a surface that is at a TS temperature to the surrounding environment that is a Te is expressed by Newton's law of cooling as

`Q_(con) = h*A_(s) *(T_(s) - T_(e) )`

where As is the surface area of heat transfer and h is the coefficient of convection heat transfer. When TS and Te temperatures are fixed for design reasons, as is often the case, there are two ways to increase the ratio of heat transfer: convection heat transfer coefficient, h, or increase area surface As. Increasing h may require the installation of a pump or fan, or replace the existing one with a larger one, but this procedure it may not be practical or appropriate. The alternative is to increase the area surface when adding extended surfaces called fins, made of intensely conductive materials such as aluminum. Surfaces with

fins are made by extruding, welding or wrapping a thin sheet of metal on the surface. Fins improve heat transfer from a surface by exposing a larger area to convection and radiation. Fin surfaces are commonly used in practice to improve heat transfer and often increase the reason for this transfer