PHY4604 R. D. Field Department of Physics Chapter4_27.doc University of Florida Electrons and Magnetism Magnetic Dipole:The magnetic field on the z-axis of a current loopwith area A=πR2and current Iis given by Bz(z) = 2kµ/z3,when z >> R, where the magnetic dipole momentµ= IA.Orbital Magnetic Moment:Consider a single particle with charge qand mass mundergoing uniform circular motionwith radius Rabout the z-axis. The period of the orbit is given by T = 2πR/v, where vis the particles speed. The magnetic moment (called the orbital magnetic moment) is µπorbIAqTRqvR===22, since I = q/T. The orbital magnetic moment can be written in terms of the orbital angular momentum,
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 05/29/2011 for the course PHY 4064 taught by Professor Fields during the Spring '07 term at University of Florida.