Natural Science Forum / Physics / Electromagnetism / June 2005

I am working on a project, in which I have to come up with solutions
that closely resemble different human organs in terms of conductivity
and permitivity and then experiment with those solutions. My question
is, given values of conductivity and permitivity, what sort of

Can someone briefly explain how AC currents go through capacitors? I
always thought that there was no current in the dielectric but rather
the AC current was simply changes in charge densities on the plates
(and the associated AC currents were external to the capacitor to

Am interested in combining the radial and tangential fields from, say,
a simple electric dipole (electrically short).  I've seen nothing in
the literature to indicate how this should be done.  I need to
calculate the total fields but must include the radial portion since

Does anyone know a site that has James Maxwell's "A Dynamical Theory of
the Electromagnetic Field" paper in its original and unedited form?

1. What formula correctly describes the immeasurable force between
moving charges?
2. How does one reconcile the contradiction between the
Biot-Savart/Lorentz force and Newton's third law?

You are all invited to view the pdf's at
www.biophotonicsresearchinstitute.com
on the topic of EM self-field theory.
This theory is the one that Einstein and others including Heisenberg were

In most illustration of the electromagnetic wave, there is
a vertical moving sine wave that represents the magnetic
field and a horizonal moving sine wave at right angle
that represents the electric field. Now when they are

I'm looking for a reference on the relevance of the skin effect
on inductance (not resistance).
I see how to compute self-inductance of a conductor by integrating
the Neumann formula, assuming even distribution of current across

I heard that the magical energy of kobolds can be used to power
electromagnets, so that I can build a super-railgun to shoot my
spaceship to Ganymed.
Is that possible ?

A wire carrying DC has static field.. similar to the one
in bar magnets. How come when you put two parallel wires
together in the DC circuit. The magnetic field cancels
while in a bar magnet, it doesn't. If you do proper

The questions I have regards synchronous motors. The book I'm reading refers
to S. motors with permanent magnets surface mounted on the rotor.
It says that under no-load conditions, the emf induced into the stator by
the rotating PM is equal and opposite the applied (mains) ...

I got this magnetic field meter. It is set at 60 Hz.
How come I can get a reading using wire with DC but
not a bar magnet. Isn't it that the magnetic field
from a wire carrying DC is static, similar to the