A uniform magnetic field points upward, in the plane of the paper. A wire is perpendicular to the paper. When the wire carries a current, the net magnetic field at point 2 is zero. (a) What is the direction of the current in the wire – into or out of the paper? Explain. (b) Point 1 is the same distance from the wire as point 2. Use a vector diagram to determine the net magnetic field at point 1. (c) Point 3 is twice as far from the wire as point 2. Use a vector diagram to determine the net magnetic field at point 3. Both length and direction of your vectors are important. (d) If the net magnetic field at point 3 is 1.0x10-4 T, how much current is flowing in the wire? 3 Wire 1 1.0 cm

A uniform magnetic field points upward, in the plane of the paper. A wire is perpendicular to the paper. When the wire carries a current, the net magnetic field at point 2 is zero. (a) What is the direction of the current in the wire – into or out of the paper? Explain. (b) Point 1 is the same distance from the wire as point 2. Use a vector diagram to determine the net magnetic field at point 1. (c) Point 3 is twice as far from the wire as point 2. Use a vector diagram to determine the net magnetic field at point 3. Both length and direction of your vectors are important. (d) If the net magnetic field at point 3 is 1.0x10-4 T, how much current is flowing in the wire? 3 Wire 1 1.0 cm

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 103A

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