▾ Part A A 1.40 m cylindrical rod of diameter 0.550 cm is connected to a power supply that maintains a constant potential difference of 12.0 V across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0° C) the ammeter reads 18.4 A, while at 92.0° C it reads 17.4 A. You can ignore any thermal expansion of the rod. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Temperature dependence of resistance. Find the resistivity for the material of the rod at 20.0° C. Express your answer in ohm-meters. ΜΕ ΑΣΦ 0 ? p = Submit Previous Answers Request Answer Incorrect; Try Again; 4 attempts remaining Ω Part B Find the temperature coefficient of resistivity at 20.0°C for the material Express your answer in reciprocal degrees Celsius to two signific

▾ Part A A 1.40 m cylindrical rod of diameter 0.550 cm is connected to a power supply that maintains a constant potential difference of 12.0 V across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.0° C) the ammeter reads 18.4 A, while at 92.0° C it reads 17.4 A. You can ignore any thermal expansion of the rod. For related problemsolving tips and strategies, you may want to view a Video Tutor Solution of Temperature dependence of resistance. Find the resistivity for the material of the rod at 20.0° C. Express your answer in ohm-meters. ΜΕ ΑΣΦ 0 ? p = Submit Previous Answers Request Answer Incorrect; Try Again; 4 attempts remaining Ω Part B Find the temperature coefficient of resistivity at 20.0°C for the material Express your answer in reciprocal degrees Celsius to two signific

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter21: Current And Direct Current Circuits

Section: Chapter Questions

Problem 9OQ

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