Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter22: Magnetic Forces And Magnetic Fields
Section22.9: Ampère’s Law
Problem 22.6QQ: Figure 22.30 (Quick Quiz 22.6) Four closed paths around three current-carrying wires. Rank the...
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Question
Why are thick wires rather than thin wires usually used to carry large currents?
Expert Solution
Introduction:
Ohm's law states that the current (I) and the resistance (R) of a wire or a conductor is inversely proportional to each other. The resistance of a wire is the obstruction caused by it in the flow of electric current. The resistance of a wire also depends on the length (l) of the wire and the area (A) of its cross-section.
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