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| Teaching Since: | May 2017 |
| Last Sign in: | 399 Weeks Ago |
| Questions Answered: | 66690 |
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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
(a) A phonograph record of radius R, carrying a uniform surface charge u, is rotating at constant angular velocity w. Find its magnetic dipole moment.
(b) Find the magnetic dipole moment of the spinning spherical shell in Ex. 5.11. Show that for points r > R the potential is that of a perfect dipole.
Example 5.11
A spherical shell of radius R, carrying a uniform surface charge σ, is set spinning at angular velocity ω. Find the vector potential it produces at point r (Fig. 5.45).

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