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7) Wire is wrapped around the equator of an Earth globe of radius 15cm, making ten complete trips. The globe itself is a plastic sphere. To get a magnetic field of 23mT at the north pole, how much current would be needed?

7) Wire is wrapped around the equator of an Earth globe of radius 15cm, making ten complete trips. The globe itself is a plastic sphere. To get a magnetic field of 23mT at the north pole, how much current would be needed?

College Physics
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
Section: Chapter Questions
Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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**Problem 7: Electromagnetic Field** A wire is wrapped around the equator of an Earth globe with a radius of 15 cm, making ten complete trips. The globe itself is a plastic sphere. To achieve a magnetic field of 23 mT (milliteslas) at the north pole, calculate the required amount of current.
Transcribed Image Text:**Problem 7: Electromagnetic Field** A wire is wrapped around the equator of an Earth globe with a radius of 15 cm, making ten complete trips. The globe itself is a plastic sphere. To achieve a magnetic field of 23 mT (milliteslas) at the north pole, calculate the required amount of current.
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