When a car's starter is in use, it draws a large current. The car's lights draw much less current. As a certain car is starting, the current through the battery is 57.0 A and the potential difference across the battery terminals is 8.10 V. When only the car's lights are used, the current through the battery is 2.10 A and the terminal potential difference is 11.8 V. Find the battery's emf and internal resistance

College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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When a car's starter is in use, it draws a large current. The car's lights draw much less current. As a certain car is starting, the current through the battery is 57.0 A and the potential difference across the battery terminals is 8.10 V. When only the car's lights are used, the current through the battery is 2.10 A and the terminal potential difference is 11.8 V. Find the battery's emf and internal resistance

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Step 1

GIVEN DATA:

When the car's starter is in use, it draws a large current.

Current, I = 57.0 A

Potential difference, V = 8.10 V

The car's lights draw much less current

When only the car's lights are used, current is 2.10 A and the terminal potential difference is 11.8 V

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