Q₁)A cylindrical resistor element on a circuit board dissipates 0.6 W of power. The resistor is 1.5 cm long, and has a diameter of 0.4 cm. Assuming heat to be transferred uniformly from all surfaces, determine (a) the amount of heat this resistor dissipates during a 24-hour period, (b) the heat flux, and (c) the fraction of heat dissipated from the top and bottom surfaces. Ans: (a) 51.84 kJ (b) 0.2809 W/cm² (c) 0.118
Q₁)A cylindrical resistor element on a circuit board dissipates 0.6 W of power. The resistor is 1.5 cm long, and has a diameter of 0.4 cm. Assuming heat to be transferred uniformly from all surfaces, determine (a) the amount of heat this resistor dissipates during a 24-hour period, (b) the heat flux, and (c) the fraction of heat dissipated from the top and bottom surfaces. Ans: (a) 51.84 kJ (b) 0.2809 W/cm² (c) 0.118
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 2.4P: A plane wall 15 cm thick has a thermal conductivity given by the relation k=2.0+0.0005T[W/mK] where...
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![Q₁ )A cylindrical resistor element on a circuit board dissipates 0.6 W of power.
The resistor is 1.5 cm long, and has a diameter of 0.4 cm. Assuming heat to be
transferred uniformly from all surfaces, determine (a) the amount of heat this
resistor dissipates during a 24-hour period, (b) the heat flux, and (c) the fraction of
heat dissipated from the top and bottom surfaces.
Ans: (a) 51.84 kJ
(b) 0.2809 W/cm²
(c) 0.118](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F8b31ecf7-15e3-48a9-8d0d-4f4e865e2905%2F5676aeef-663c-4642-9c45-64b12e06d8fa%2F2yt7mb_processed.jpeg&w=3840&q=75)
Transcribed Image Text:Q₁ )A cylindrical resistor element on a circuit board dissipates 0.6 W of power.
The resistor is 1.5 cm long, and has a diameter of 0.4 cm. Assuming heat to be
transferred uniformly from all surfaces, determine (a) the amount of heat this
resistor dissipates during a 24-hour period, (b) the heat flux, and (c) the fraction of
heat dissipated from the top and bottom surfaces.
Ans: (a) 51.84 kJ
(b) 0.2809 W/cm²
(c) 0.118
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