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A wire of 6.5mm diameter at a temperature of 60 C is insulated by a plastic material having thermal conductivity (k) equal to 0.174 W/(m. C). The convection heat transfer coefficient h=8.722 W/(m. C). For the maximum heat loss to the ambient air at 20 C, what is the critical radius of insulation. Will the heat loss increase or decrease?

A wire of 6.5mm diameter at a temperature of 60 C is insulated by a plastic material having thermal conductivity (k) equal to 0.174 W/(m. C). The convection heat transfer coefficient h=8.722 W/(m. C). For the maximum heat loss to the ambient air at 20 C, what is the critical radius of insulation. Will the heat loss increase or decrease?

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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A wire of 6.5mm diameter at a temperature of 60 C is insulated by a plastic material having thermal conductivity (k) equal to 0.174 W/(m. C). The convection heat transfer coefficient h=8.722 W/(m2. C). For the maximum heat loss to the ambient air at 20 C, what is the critical radius of insulation. Will the heat loss increase or decrease?
Transcribed Image Text:A wire of 6.5mm diameter at a temperature of 60 C is insulated by a plastic material having thermal conductivity (k) equal to 0.174 W/(m. C). The convection heat transfer coefficient h=8.722 W/(m2. C). For the maximum heat loss to the ambient air at 20 C, what is the critical radius of insulation. Will the heat loss increase or decrease?
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