The resistance of a 10 ft length of a resistor material having a cross section of 0.00204 in2is 4.1 ohms. The resistance at the same temperature of a 12 ft length of the same material is 7.1 ohms. Determine its cross-section in square inches.

The resistance of a 10 ft length of a resistor material having a cross section of 0.00204 in2is 4.1 ohms. The resistance at the same temperature of a 12 ft length of the same material is 7.1 ohms. Determine its cross-section in square inches.

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter12: Electronic Control Devices

Section: Chapter Questions

Problem 14RQ

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Concept explainers

Electrical Heating Unit

The conversion of electrical energy to heat energy is known as electric heating. The heating system that converts the electrical energy to heat energy for various application is called electrical heating unit. Electricity is employed as the firing mechanism in electric heating systems, which transforms electric current to heat. Electric heaters have heating elements in the form of electric resistors.

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The resistance of a 10 ft length of a resistor material having a cross section of 0.00204 in²is 4.1 ohms. The resistance at the same temperature of a 12 ft length of the same material is 7.1 ohms. Determine its cross-section in square inches.

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