A % Watt resistor is surrounded by still air at room temperature (20 °C). The resistor is approximately cylindrical with a length of 20 mm and a radius of 1 mm. Using the long-wire approximation, how hot will the resistor get if operated at the maximum rated power level, assuming a convection coefficient of h=500 W/m² °C? Express your answer in Celsius and Fahrenheit. (Note: a more accurate model would include conduction heat transfer through the leads of the resistor).

A % Watt resistor is surrounded by still air at room temperature (20 °C). The resistor is approximately cylindrical with a length of 20 mm and a radius of 1 mm. Using the long-wire approximation, how hot will the resistor get if operated at the maximum rated power level, assuming a convection coefficient of h=500 W/m² °C? Express your answer in Celsius and Fahrenheit. (Note: a more accurate model would include conduction heat transfer through the leads of the resistor).

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.8MCQ: An ac resistance is higher than a dc resistance. True False

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