Question: as discussed in the class, the electric field vector J is related to the current density vector E through the following relation where the conductivity

as discussed in the class, the electric field vector J is related to the current density vector E through the following relation where the conductivity is a quantity that multiplies the vector E in order to obtain the vector J. When quantities such as here relate two vectors in this way, we call them as tensors of the second rank or second order

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