College Physics
College Physics
11th Edition
ISBN: 9781305952300
Author: Raymond A. Serway, Chris Vuille
Publisher: Cengage Learning
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You are given a wire of length I and cross-section area A. You put a potential difference of Vacross it and measure the current I that runs through it. You then cut the wire in half
lengthwise and solder the ends together, constructing a wire with twice the length as the original. You again put a potential difference V across the wire. In terms of the original
quantities,
1. What is the resistance of the new wire?
2. What is the current through the new wire?
3. What is the current density through the new wire?
4. What is the electric field through the new wire?
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Transcribed Image Text:You are given a wire of length I and cross-section area A. You put a potential difference of Vacross it and measure the current I that runs through it. You then cut the wire in half lengthwise and solder the ends together, constructing a wire with twice the length as the original. You again put a potential difference V across the wire. In terms of the original quantities, 1. What is the resistance of the new wire? 2. What is the current through the new wire? 3. What is the current density through the new wire? 4. What is the electric field through the new wire?
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