Introduction to Electrodynamics · Problem 5.48

Magnetic Fields in Matter — David J. Griffiths

Physics · magnetic-dipole

Problem

Use Eq. 5.41 to obtain the magnetic field on the axis of the rotating disk in Prob. 5.37(a). Show that the dipole field (Eq. 5.88), with the dipole moment you found in Prob. 5.37, is a good approximation if z≫Rz \gg R.

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