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wykk

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Thread moved from the technical forums to the schoolwork forums

The problem says I have a spherically symmetric spinning constant charge distribution of charge Q and angular momentum w; I saw two possible explanations but none of them has made me realize why it is zero, one mentions thata constant w somehow implies a constant E which would mean there is no B and poynting vector would be zero.

Another mentions that the charge distribution rho is constant therefore J the current density is too and B becomes zero but I don't know how to derive an expression that relates B and J

Another mentions that the charge distribution rho is constant therefore J the current density is too and B becomes zero but I don't know how to derive an expression that relates B and J