25. A copper wire has a 25-m resistance at 20 C. When the wire is carrying...
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25. •• A copper wire has a 25-mΩ resistance at 20 °C.
When the wire is carrying a current, heat produced by the current causes the temperature of the wire to increase by 27 °C.
(a) What is the change in the wire’s resistance?
(b) If its original current was 10.0 mA, what is its final current?
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Related Book For 
College Physics Essentials Electricity And Magnetism Optics Modern Physics Volume Two
ISBN: 9781032337272
8th Edition
Authors: Jerry D. Wilson, Anthony J. Buffa, Bo Lou
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