A copper rod, 6 mm in diameter is heated by flow of an electric current. The surface of the rod is maintained at 200°C, while it dissipates heat by convectlon, with h= 150 W/m.K into an ambient at 25°C. If the rod is covered with 2 mm thick coating (k = 0.75 W/m.K), will the heat loss from the rod decrease or increase?

A copper rod, 6 mm in diameter is heated by flow of an electric current. The surface of the rod is maintained at 200°C, while it dissipates heat by convectlon, with h= 150 W/m.K into an ambient at 25°C. If the rod is covered with 2 mm thick coating (k = 0.75 W/m.K), will the heat loss from the rod decrease or increase?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Take you time but please provide correct answer.

A copper rod, 6 mm in diameter is heated by flow of an electric current. The surface of the rod is
maintained at 200°C, while it dissipates heat by convection, with h= 150 W/m?.K into an ambient at
25°C. If the rod is covered with 2 mm thick coating (k = 0.75 W/m.K), will the heat loss from the rod
decrease or increase?

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