A student makes a short electromagnet by winding 300 turns of wire around a wooden cylinder of
Question:
A student makes a short electromagnet by winding 300 turns of wire around a wooden cylinder of diameter d = 5.0 cm. The coil is connected to a battery producing a current of 4.0 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 5.0μT (approximately one-tenth that of Earth's magnetic field)?
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a The magnitude of the magnetic dipole moment is given by uNiA where N ...View the full answer
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Related Book For 
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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