An electrical wire 2 m long and 0.3 cm in diameter extends through a room at 15 °C, as shown in the figure. Heat is generated in the wire as result of resistance heating and the surface temperature of the that wire as 152 °C in steady operation. Also, the drop in voltage and electric current passing through the wire, resulting in 60 V and 1.5 A, respectively. If any heat transfer by radiation is ruled out, determine the coefficient of heat transfer by convection between the outer surface of the wire and the air that is in the room.
An electrical wire 2 m long and 0.3 cm in diameter extends through a room at 15 °C, as shown in the figure. Heat is generated in the wire as result of resistance heating and the surface temperature of the that wire as 152 °C in steady operation. Also, the drop in voltage and electric current passing through the wire, resulting in 60 V and 1.5 A, respectively. If any heat transfer by radiation is ruled out, determine the coefficient of heat transfer by convection between the outer surface of the wire and the air that is in the room.
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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An electrical wire 2 m long and 0.3 cm in diameter extends through a
room at 15 °C, as shown in the figure. Heat is generated in the wire as
result of resistance heating and the surface temperature of the
that wire as 152 °C in steady operation. Also, the drop in
voltage and electric current passing through the wire, resulting in 60 V and 1.5 A,
respectively. If any heat transfer by radiation is ruled out, determine
the coefficient of heat transfer by convection between the outer surface of the
wire and the air that is in the room.
Transcribed Image Text:Too = 15 °C
1.5 A
60 V.
152 °C
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