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Moses Fayngold wrote:
Why do you say these are not currents, but rather current densities?
current density.
This is a bit like saying that Gauss law proves the electric field is
not a vector because the r.h.s is proportional to Q_enclosed which is
clearly not a vector.
It only proves that electric flux is not a vector. And your statement
only proves that flux of current density is not a vector.
I don't think John would deny defining something different from the I_f
that occurs in the expression I_f = dQ/dt. So what. Its not all that
conventional; but it may be a useful definition in certain
circumstances, like getting the signs correct in the discharging
capacitor problem that sparked this thread.