. A 6-m-long 2-kW electrical resistance wire is made of 0.2-cm-diameter stainless steel (k = 15.1 W/m °C). The re- sistance wire operates in an environment at 30°C with a heat transfer coefficient of 140 W/m². °C at the outer surface. De- termine the surface temperature of the wire (a) by using the ap- plicable relation and (b) by setting up the proper differential equation and solving it. Answers: (a) 409°C, (b) 409°C

. A 6-m-long 2-kW electrical resistance wire is made of 0.2-cm-diameter stainless steel (k = 15.1 W/m °C). The re- sistance wire operates in an environment at 30°C with a heat transfer coefficient of 140 W/m². °C at the outer surface. De- termine the surface temperature of the wire (a) by using the ap- plicable relation and (b) by setting up the proper differential equation and solving it. Answers: (a) 409°C, (b) 409°C

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

See similar textbooks

Related questions

Q: A spent nuclear rod 2 m in length and 20 cm in diameter is encased in concrete, a cylinder 2 m long…

A: To Find : The depth of the rod for buried Given : The heat generated rate of spent rod is The length…

Q: Steel balls 12 mm in diameter are annealed by heating to 1100 K and then slowly cooling to 380 K in…

A: The given information in the problem is shown in the following attached image:

Q: Under steady-state conditions, the wall of a brick house is measured to have an inside temperature…

Q: A long, 150-mm-diameter cylindrical metal (k = 20 W/m-K, p = 7900 kg/m³, cp = 650 J/kg-K) billet is…

A: The diameter is The thermal conductivity is The density is The specific heat capacity is The initial…

Q: A 2.5-cm-thick sheet of plastic initially at 20oC is placed between two heated steel plates that are…

A: Giventhe thermal diffusivity the thermal conductivity of the plasticthickness of the sheet…

Q: A flat wall 0.1 m thick and k = 25 W/(m-°C) has a heat generation rate per unit ofvolume of 0.3…

A: The problem involves a flat wall with heat generation and heat transfer to a fluid. The wall is…

Q: D2 A 3-m intemal diameter sphèrical tank made of 2-cm-thick staaless steel (k-15 W/m 0°C. The tank…

Q: calculate the reduction in the heat transfer rate if a 5-cm-insulation battwith thermal conductivity…

A: As heat transfer is given by, Q=-KAdTdxQA=-0.05*dT0.05=-dT

Q: A steel pipe having a 0.05m outer diameter is covered with a 0.042 m thick layer of magnesia (kes…

A: Givend=0.05mt1=0.042mkmg=0.07 W/m.Kt2=0.024mkf=0.048 W/mKT1=370KT3=305 K

Q: A flat cereal has a thickness of 2L =1.2mm. The specific mass, specific heat and thermal…

Q: A long 50-cm diameter cylindrical shaft (k = 15 W/m·K, p= 7900 kg/m², C, = 477 J/kg-K) comes out of…

A: Given: The diameter of the cylinder, d = 50 cm = 0.5 m The thermal conductivity of the shaft, k = 15…

Q: A long rod of AISI 4130 steel initially at a uniform temperature of 400°C is suddenly exposed to…

Q: A. The Heat Flow B. Conductive resistance

A: (a) Heat flow = Q=T1-T2L/(kA) T1-T2=∆T= Temperature difference L = thickness of the wall k = thermal…

Q: consider a large plane wall of thickness 0.21 m, thermal conductivity k=1.2 w/m-c and surface area…

Q: The roof of a house absorbs a solar radiant flux of 600 W/m", while the underside to the ceiling is…

A: Q= h A ( T2-T1) q= Q/A = h( T2-T1)

Question

.
A 6-m-long 2-kW electrical resistance wire is made of
0.2-cm-diameter stainless steel (k = 15.1 W/m °C). The re-
sistance wire operates in an environment at 30°C with a heat
transfer coefficient of 140 W/m². °C at the outer surface. De-
termine the surface temperature of the wire (a) by using the ap-
plicable relation and (b) by setting up the proper differential
equation and solving it. Answers: (a) 409°C, (b) 409°C

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

The wall of a furnace consists of a 0.85 cm-thick layer of steel (ks = 15.1 W/m/K) and an outer layer of brick (kb = .72 W/m/K). The outer surface temperature of the brick, To = 50oC, and is exposed to convection with air at 20oC providing a heat transfer coefficient of 150 W/m^2/K. Determine the steady temperature at the steel brick interface, Tmid, and on the exposed steel surface, Ti, if the brick layer has thickness Lb = 5 cm.
Q3/ A 6(m) long 2(kW) electrical resistance wire is made of 0.2(cm) diameter stainless steel (k = 15.1 W/m °C). The resistance wire operates in an environment at 30°C with a heat transfer coefficient of 140 (W/m?. °C) at the outer surface. Find the temperature distribution equation and determine the surface temperature of the wire.
based on a large 4 cm thick plate that is initially at a uniform temperature of 20°C that is heated by passing it through a space maintained at 500°C. The plate remains in the space for a period of 7 min. Take the heat transfer coefficient to be 120-W/m2°C. Example 4-4 [k = 110-W/m°C, r = 8530-kg/m³, C, = 0.380-kJ/kg°C, a = 33.9 x 10-6 m²/s] The dimensionless distance from center to a point 0.4-cm below the outer surface is 0.5 0.8 none of the above 0.2
Steel cubes 10 mm in width are annealed by heating to 1,377 K and then slowly cooling to 469 K in an air environment for which T∞ = 301 K and h = 24 W/m2-K. Assuming the properties of the steel to be k = 24 W/m · K, ρ = 7,047 kg/m3, and c = 916 J/kg · K, estimate the time required for the cooling process.
Q4/A 2-mm-diameter and 10-m-long electric wire is tightly wrapped with a 1-mm-thick plastic cover whose thermal conductivity is k-0.15 W/m "C. Electrical measurements indicate that a current of 10 A passes through the wire and there is a voltage drop of 8 V along the wire. If the insulated wire is exposed to a medium at Ts= 30°C with a heat transfer coefficient of h-24 W/m² C, determine the temperature at the interface of the wire and the plastic cover in steady operation. Also find the critical radius of plastic insulation. [334 T=30°C Electrical wire Insulation bale 10 m
The thermal conductivity of a solid material can be determined using asetup similar to the one shown in the accompanying figure. The thermocouples are placed at 2.5 cm intervals in the known material (copper alloy, k - 52 w/m.k) and the unknown sample, as shown. The known material is heated on the top by a heating element, and the bottom surface of the sample is cooled by running water through the heat sink shown. Determine the thermal conductivity of the unknown sample for the set of data given in the accompanying table. Assume no heat loss to the surroundings and perfect thermal contact at the common interface of the sample and the copper.