Chapter 32 Maxwell’s Equations; Magnetism in Matter In this chapter we will discuss the following topics: -Gauss’ law for magnetism -The missing term from Ampere’s law added by Maxwell -The magnetic field of the Earth -Orbital and spin magnetic moment of the electron -Diamagnetic materials -Paramagnetic materials -Ferromagnetic materials (32–1)

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(32–12) Geographic North N S Compass needle horizontal Compass needle Fig. a : Top view Geographic North Compass needle N S Fig. b : Side view horizontal Compass needle (32–12)

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