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Magnetism and Dipoles in a Magnetic Field

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- A magnetic dipole m = −m0 ˆ z is situated at the origin, in an otherwise uniform magnetic field B = B0 ˆ z.
- Show that there exists a spherical surface, centered at the origin, through which no magnetic field lines pass.
- Find the radius of this sphere, and sketch the field lines, inside and out.

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The solution examines magnetism and dipoles in a magnetic field in a sphere. The radius of the sphere is calculated.

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