When the temperature is 130 degree C, the resistance of a resistor is 45 ohms. When the temperature is increased to 200 degrees C, the resistance increases to 69 ohms. Find the resistance at 20 degree C, R9 =? a. 4.5 Ohms b. 5.6 Ohms c. 7.2 Ohms d. 8.4 Ohms

When the temperature is 130 degree C, the resistance of a resistor is 45 ohms. When the temperature is increased to 200 degrees C, the resistance increases to 69 ohms. Find the resistance at 20 degree C, R9 =? a. 4.5 Ohms b. 5.6 Ohms c. 7.2 Ohms d. 8.4 Ohms

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter28: Current And Resistance

Section: Chapter Questions

Problem 67PQ

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Concept explainers

Temperature Variance of Resistance

Electrical resistance or simply resistance is the property of a material that opposes the free flow of electrons through it. The total amount of resistance to the flow of charges (or current) is affected by many factors like the length of the conducting material, its cross-sectional area, resistivity, and temperature.

Question

When the temperature is 130 degree C, the resistance of a resistor is 45 ohms. When the temperature is
increased to 200 degrees C, the resistance increases to 69 ohms.
Find the resistance at 20 degree C, R, = ?
a. 4,5 Ohms
b. 5.6 Ohms
c. 7.2 Ohms
d. 8.4 Ohms

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