Divergence of electric field

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1. Jul 15, 2015

fricke

Why is the divergence of electric field not zero for a material with non-constant conductivity?

2. Jul 15, 2015

Dr. Courtney

Why would it be?

3. Jul 15, 2015

Staff: Mentor

There are times when a material with non constant conductivity will have an E field with zero divergence. Can you think when that happens? So what is different?