An auto mechanic needs to determine the emf and internal resistance of an old battery. He performs two measurements: in the first, he applies a voltmeter to the battery's terminals and reads 11.8 V; in the second, he applies an ammeter to the terminals and reads 17.7 A. What are the battery's emf E and internal resistance r? E = V r = Ω
An auto mechanic needs to determine the emf and internal resistance of an old battery. He performs two measurements: in the first, he applies a voltmeter to the battery's terminals and reads 11.8 V; in the second, he applies an ammeter to the terminals and reads 17.7 A. What are the battery's emf E and internal resistance r? E = V r = Ω
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter29: Direct Current (dc) Circuits
Section: Chapter Questions
Problem 19PQ
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