Q2) A long horizontal wire of 0.2 mm diameter has a constant temperature of 54 C caused by an electric current. This wire is placed in cold air whose temperature reaches 0 C. Find the required electric power to keep the wire temperature at 54 C.

Q2) A long horizontal wire of 0.2 mm diameter has a constant temperature of 54 C caused by an electric current. This wire is placed in cold air whose temperature reaches 0 C. Find the required electric power to keep the wire temperature at 54 C.

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.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.12P: 8.12 An electric room heater has been designed in the shape of a vertical cylinder 2 m tall and 30...

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Concept explainers

Conduction and Convection

When energy travels from one object to another it is said to have undergone heat transfer. Heat transfer is nothing but the transfer of thermal energy or internal energy from one thing to another, like e.g., when a vessel with water, kept on top of a burner, heats up because of the flame underneath it.

Question

Q2) A long horizontal wire of 0.2 mm diameter has a constant
temperature of 54 C caused by an electric current. This wire is
placed in cold air whose temperature reaches 0 C. Find the
required electric power to keep the wire temperature at 54 C.

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