a) Explain the importance of thermal management of electronics devices.

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a) Explain the importance of thermal management of electronics devices. 

(b) Heat sink rated at 10°C/W will get 10°C hotter than the surrounding air when it dissipates 1 Watt of heat. Discuss the suitability of heat sink for above scenario in terms of thermal resistance.

(c) Thermocouples are commonly used to measure temperature. There can be errors due to heat transfer by radiation. Consider a black thermocouple in a chamber with black walls

Suppose the air is at 20 °C, the walls are at 100 °C, and the convective heat transfer coefficient is 15 Wm-2 k -1 .

a) What temperature does the thermocouple read? 

b) If thermos couple sees a higher temperature than air, how could you reduce this error? 

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