Diameter of a Solid conductor wire is 2.54 cm and the thickness of the insulation is 3 mm.When the current is flowing, the rate of heat dissipation from the wire is 417 W per unit lengthof wire. If the outer surface temperature of the insulation is 28 °C, Calculate the inner surfacetemperature of the insulation. Take the thermal conductivity of the insulation material as0.44 W/m K.

Answered: Image /qna-images/answer/cf0db82c-8e16-4979-a72e-9699d7c18148.jpg

Answered: Diameter of a Solid conductor wire is…

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 58PQ

See similar textbooks

Similar questions

Show that the thermal resistance of a rectangular enclosure can be expressed as R = Lc /(Ak Nu), where k is the thermal conductivity of the fluid in the enclosure.
A length of copper wire is connected to a constant voltage source and a current of 0.4 A is precisely measured at a temperature of 34°C. The temperature of the wire increases and later the current is 0.33 A. Find the temperature of the wire when the current is 0.33 A. For copper, ? = 0.0068 °C-1 at 20°C. Temperature=
The tungsten filament of a light bulb has an operating temperature of about 2100 K.If the emitting area of the filament is 1 cm2, and its emissivity (ε) is 0.68, what is the power output of the light bulb?
A walrus transfers energy by conduction through its blubber at the rate of 150 W when immersed in -1.00C water. The walrus’s internal core temperature is 37.0C, and it has a surface area of 2.00m. What is the average thickness of its blubber, which has the conductivity of fatty tissues without blood?
The thermal contact conductance at the interface of two 1-cm-thick copper plates is measured to be 18,000 W/m2·K. Determine the thickness of the copper plate whose thermal resistance is equal to the thermal resistance of the interface between the plates.
The filament in a light bulb has a diameter of 0.02 mm and an emissivity of 1.0. The temperature of the filament is 3×1000°C. What should be the length of the filament in meters so it will radiate 60 W of power? The Stefan-Boltzmann constant is 5.670 × 10-8 W/m2 · K4. Please give your answer with 3 decimal places.
A water-heater is covered with insulation boards over a total surface area of 3 m2. The inside board surface is at 75°C and the outside being at 20°C and the conductivity of material being 0.08 W/m K. Find the thickness of board to limit the heat transfer loss to 200 W ?
An electric kitchen range has a total wall area of 1.40 m2and is insulated with a layer of fiberglass 4.00 cm thick. The insidesurface of the fiberglass has a temperature of 175°C, and its outsidesurface is at 35.0°C. The fiberglass has a thermal conductivity of0.040 W /m . K. (a) What is the heat current through the insulation,assuming it may be treated as a flat slab with an area of 1.40 m2?(b) What electric-power input to the heating element is required tomaintain this temperature?
The tungsten filament of a certain 100 W light bulb radiates 3.00 W of light. (The other 97 W is carried away by convection and conduction.) The filament has surface area of 0.210 mm2 and an emissivity of 0.950. Find the filament's temperature. (The melting point of tungsten is 3683 K.)
A square pane of glass 0.500 m on a side is 6.00 mm thick. Whenthe temperatures on the two sides of the glass are 25.0°C and -10.0°C,the heat current due to conduction through the glass is 1.10 * 10^3 W.(a) What is the thermal conductivity of the glass? (b) If the thickness of theglass is increased to 9.00 mm, what will be the heat current?
What is the rate of heat transfer by radiation, with an unclothed person standing in a dark room whose ambient temperature is 22.0ºC . The person has a normal skin temperature of 33.0ºC and a surface area of 1.50 m2 . The emissivity of skin is 0.97 in the infrared, where the radiation takes place.
The amount of thermal expansion coefficient (a) if the length of a copper rod is (5 m) at a temperature (20) and at a temperature (60), the length of the wire will increase to (Ans = (5.0036 m d = 18x10 deg / %3D

SEE MORE QUESTIONS

Recommended textbooks for you

Physics for Scientists and Engineers: Foundations…

Physics

ISBN:

9781133939146

Author:

Katz, Debora M.

Publisher:

Cengage Learning