On 2011-10-06, Lloyd E. Sponenburgh lloydspinsidemindspring.com wrote:
Jon Elson fired this volley in
:

There is also no radiation or ground heating from DC.

Jon

Jon, that's not right (not completely). ANY conductor carrying a current
induces a magnetic flux around itself, the strength of which is entirely
dependent upon current, not voltage.

But the flux is constant and thus, does not induce any electromagnetc
waves or current in the ground.

Although AC transmission produces a moving (alternating) magnetic field
that can induce currents in still objects (like the ground, yes), the
magnetic field around a DC conductor can still induce currents in moving
objects (like people, vehicles, etc.).

Good point.

So it's not right to say a DC conductor doesn't "radiate", because it
does radiate a magnetic field. It just happens to be a static field, so
long as the current remains constant. Vary the current, and you have a
varying field with similar (if reduced) effects like those of an AC
transmission line.

Very good clarification.