An auto mechanic needs to determine the emf and the internal resistance of an old battery. He performs two measurements: in the first, he applies a voltmeter to the battery's terminals and reads 11.9 V; in the second, he applies an ammeter to the terminals and it reads 15.9 A. What are the battery's emf and internal resistance?

An auto mechanic needs to determine the emf and the internal resistance of an old battery. He performs two measurements: in the first, he applies a voltmeter to the battery's terminals and reads 11.9 V; in the second, he applies an ammeter to the terminals and it reads 15.9 A. What are the battery's emf and internal resistance?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter9: Current And Resistance

Section: Chapter Questions

Problem 70AP: A 10.00-meter long wire cable that is made of copper has a resistance of 0.051 ohms, (a) What is the...

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