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## Main Question or Discussion Point

I recently saw that in the solution of a problem the following assumption was made - "there are no free charges in the problem, therefore the D field must be equal to 0 ". however if we use that logic to calculate the field of a polaraized sphere we get a wrong result (E=-P/e0 instead of E = -P/(3*e0)).

so my question is - what is wrong here? does it really true to treat D as the field that related only to the free charges? (assuming we work with linear dielectrics and curlP = 0)

so my question is - what is wrong here? does it really true to treat D as the field that related only to the free charges? (assuming we work with linear dielectrics and curlP = 0)