A variable resistor enables one to change the resistance. One design involves a horizontal tube of wire with a slider on the top. By moving the slider, one can change the length of wire involved, thus changing the resistance. Imagine a tube of wire with one layer made from wire 1.00 mm in diameter wrapped in a single layer with no gaps between the loops of wire ( the wire looks like a solid layer down the length of the tube). The radius of the tube is 2.50 cm. Moving the slider 1.00 cm changes the resistance of the variable resistor by 3.00 Ohms. What is the resistivity of the wire, and what is it made of?

A variable resistor enables one to change the resistance. One design involves a horizontal tube of wire with a slider on the top. By moving the slider, one can change the length of wire involved, thus changing the resistance. Imagine a tube of wire with one layer made from wire 1.00 mm in diameter wrapped in a single layer with no gaps between the loops of wire ( the wire looks like a solid layer down the length of the tube). The radius of the tube is 2.50 cm. Moving the slider 1.00 cm changes the resistance of the variable resistor by 3.00 Ohms. What is the resistivity of the wire, and what is it made of?

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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