Answered: A copper wire has a resistance of 2.4…

A copper wire has a resistance of 2.4 ohms at 20-deg. Find its resistance at 75-deg. Resistance temperature coefficient at 20-degC is 0.034/degC. 3.78 ohms 6.89 ohms 12.18 ohms 7.48 ohms

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.

Question

A copper wire has a resistance of 2.4 ohms at 20-deg. Find its resistance at 75-deg. Resistance temperature coefficient at
20-degC is 0.034/degC.
3.78 ohms
6.89 ohms
12.18 ohms
7.48 ohms

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