# Physics: Calculate the magnetic moment of the sphere

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A sphere of radius a carries a uniform surface charge density sigma. The sphere is centered at the origin and rotates about the z-axis with constant angular velocity omega.

Calculate the magnetic moment of the sphere.

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#### Solution Preview

We will slice the sphere into thin loops that carry current , and have area . Since we know the magnetic momentum of the loop ...

#### Solution Summary

The expert calculates the magnetic moments of the sphere.

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