(II) A power line carries a current of 95 A west along thetops of 8.5-m-high poles. (a) What is the magnitude anddirection of the magnetic field produced by this wire atthe ground directly below? How does this compare with theEarth’s magnetic field of about 1/2 G? (b) Where would thewire’s magnetic field cancel the Earth’s field?

(II) A power line carries a current of 95 A west along thetops of 8.5-m-high poles. (a) What is the magnitude anddirection of the magnetic field produced by this wire atthe ground directly below? How does this compare with theEarth’s magnetic field of about 1/2 G? (b) Where would thewire’s magnetic field cancel the Earth’s field?

Glencoe Physics: Principles and Problems, Student Edition

1st Edition

ISBN:9780078807213

Author:Paul W. Zitzewitz

Publisher:Paul W. Zitzewitz

Chapter24: Magnetic Fields

Section: Chapter Questions

Problem 77A

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