A student makes a short electromagnet by winding 390 turns of wire around a wooden cylinder of diameter d = 4.1 cm. The coil is connected to a battery producing a current of 4.1 A in the wire. (a) What is the magnitude of the magnetic dipole moment of this device? (b) At what axial distance z>>d will the magnetic field have the magnitude 4.8 µT (approximately one-tenth that of Earth's magnetic field)?

A student makes a short electromagnet by winding 390 turns of wire around a wooden cylinder of diameter d = 4.1 cm. The coil is connected to a battery producing a current of 4.1 A in the wire. (a) What is the magnitude of the magnetic dipole moment of this device? (b) At what axial distance z>>d will the magnetic field have the magnitude 4.8 µT (approximately one-tenth that of Earth's magnetic field)?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter12: Sources Of Magnetic Fields

Section: Chapter Questions

Problem 25P: A long, straight, horizontal wire carries a left-to-right current of 20 A. If the wire is placed in...

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