CourseNotes.53 - 13.1 Gauss’s Law for Magnetic Fields Gauss’s law for magnetic fields is I ~ B d ~ A = 0(49 This is essentially a statement

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Unformatted text preview: 13.1 Gauss’s Law for Magnetic Fields Gauss’s law for magnetic fields is I ~ B · d ~ A = 0 (49) This is essentially a statement that there is no such thing as magnetic charge. (Recall the rhs of Gauss’s law for electric fields above.) To get a feel for what it means, consider a simple magnetic with a north and a south pole. If we break the magnet into two pieces, we would find that both pieces have both a north and a south pole. If we again break one of the pieces into two we would again find that the pieces had a north and a south pole. We could carry on breaking up the magnetic until we got to the level of atoms and electrons and we would still find that the magnetic fields of these objects had both a north and a south pole. This is because the most simple magnetic structure is a magnetic dipole (a field with a north and a south pole). 13.2 Maxwell’s Modification of Ampere’s Law We have talked about how there are one and a half necessary modifications to complete Maxwell’s...
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This note was uploaded on 12/05/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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