A wire of 68 in length and 7 mm2 has a resistance of 0.98 ohms. A 136-m length of wire of the same material has a resistance of 4 at the same temperature. Find the radius of this wire. The final unit must be in millimeter, mm. Round your answer to 2 decimal places.

A wire of 68 in length and 7 mm2 has a resistance of 0.98 ohms. A 136-m length of wire of the same material has a resistance of 4 at the same temperature. Find the radius of this wire. The final unit must be in millimeter, mm. Round your answer to 2 decimal places.

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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A wire of 68 in length and 7 mm² has a resistance of 0.98 ohms. A 136-m length of wire of the same material has a resistance of 4 at the same temperature. Find the radius of this wire. The final unit must be in millimeter, mm.

Round your answer to 2 decimal places.

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