47. (a) The field of a dipole along its axis is given by Eq. 30-29: Bz=µ032π, where is the dipole moment and zis the distance from the dipole. Thus, BA=×⋅××=×−−−4101510230 107236ππ10 10−9TmJTmT.chchch.. (b) The energy of a magnetic dipole Gin a magnetic field GBis given by UBB=− ⋅ =−GGµµφcos , where is the angle between the dipole moment and the field. The energy required to turn it end-for-end (from = 0° to = 180°) is
This is the end of the preview. Sign up
access the rest of the document.
This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.