A 4-mm and 2-m-long electric wire is tightly wrapped with a 2-mm-thick plastic cover whose thermal conductivity is k =0.1 W/m-°C. Electrical measurements indicate that a current of 10 A passes through the wire and there is a voltage drop of 10 V along the wire. If the insulated wire is exposed to a medium at 7 =20 °C with a heat transfer coefficient of h=10 W/m2.°C, determine the temperatures T1 and T2 as shown in the figure below. Also determine whether doubling the .thickness of the plastic cover will increase or decrease T2 k To
A 4-mm and 2-m-long electric wire is tightly wrapped with a 2-mm-thick plastic cover whose thermal conductivity is k =0.1 W/m-°C. Electrical measurements indicate that a current of 10 A passes through the wire and there is a voltage drop of 10 V along the wire. If the insulated wire is exposed to a medium at 7 =20 °C with a heat transfer coefficient of h=10 W/m2.°C, determine the temperatures T1 and T2 as shown in the figure below. Also determine whether doubling the .thickness of the plastic cover will increase or decrease T2 k To
Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)
8th Edition
ISBN:9781305387102
Author:Kreith, Frank; Manglik, Raj M.
Publisher:Kreith, Frank; Manglik, Raj M.
Chapter2: Steady Heat Conduction
Section: Chapter Questions
Problem 2.38P:
2.38 The addition of aluminum fins has been suggested to increase the rate of heat dissipation from...
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![A 4-mm and 2-m-long electric wire is tightly wrapped with a 2-mm-thick plastic cover whose thermal conductivity is k
=0.1 W/m-°C. Electrical measurements indicate that a current of 10 A passes through the wire and there is a voltage drop
of 10 V along the wire. If the insulated wire is exposed to a medium at
=20 °C with a heat transfer coefficient of h=10
T.
W/m2.°C, determine the temperatures T1 and T2 as shown in the figure below. Also determine whether doubling the
.thickness of the plastic cover will increase or decrease T2
T](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F5ff9dd4b-3bfe-443f-b239-964b916f25a1%2Fb624ae6a-e33c-4a27-8e42-90ec1e48edf9%2Fcoo0l1h_processed.png&w=3840&q=75)
Transcribed Image Text:A 4-mm and 2-m-long electric wire is tightly wrapped with a 2-mm-thick plastic cover whose thermal conductivity is k
=0.1 W/m-°C. Electrical measurements indicate that a current of 10 A passes through the wire and there is a voltage drop
of 10 V along the wire. If the insulated wire is exposed to a medium at
=20 °C with a heat transfer coefficient of h=10
T.
W/m2.°C, determine the temperatures T1 and T2 as shown in the figure below. Also determine whether doubling the
.thickness of the plastic cover will increase or decrease T2
T
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