Natural Science Forum / Physics / Electromagnetism / January 2005

I know how to use the formulas for the Lorentz force (Vector product of
magnetic field and velocity), but I want to understand the follwing:
Why exactly is the Lorentz force a vector product?? Why are charges
always moving perpendicular to the magnetic field and the velocity? In

I´m looking for a used (low budget !) PULSE GENERATOR
with the option of pulse-frequency-modulation dependent on the voltage of
the trigger-signal (input):
Offset-option off the trigger-signal welcome.

Does the equation for Lorentz contraction stay exactly the same when
quantifying the 'mass increase factor' at relativistic speeds? Further,
when one moves at close to light speeds, the view of the surrounding
universe seen from the ship is distorted into a circular window. Would

Hi, I am doing research in scattering form objects residing in lossy
media. I have developed a fast integral equation method pertinent to
this study. However, it is hard to find purely lossy media in practice,
which limits the application of my algorithm. Does any body know

Gravity As Thermodynamics:
  The Explanation For The Universe.
There is a fear among thinkers too clever for their
own good that perhaps none of them may prove to be

In the book "Classical Electrodynamics", Jackson clearly states
that much of the electrodynamics had developed as an experimental
science.
 I am wondering if there have been successful attempts to develop the

A special nonlinear electromagnetic field theory - the curvilinear
wave electrodynamics (CWED), whose equation in the matrix form is
similar to the equation of the Dirac lepton theory, is offered
http://arxiv.org/abs/hep-ph/0411314

Today I heard in conversation the formula E = mc^2 and Special
Relativity. And I am familar to the old puzzle of why gravity and
Coulomb forces are inverse square laws is because they are spherical.
But not enough has been said as to the spherical foundation that is the

Kto-to govorit po-russki?

Consider a selonoid carrying a changing current, so that the B field
inside it is also changing. The B field outside the selonoid is always
zero. Now if we wound a wire around the selonoid, for example only one
winding, and connect this wire to an ampere-meter, it will read a

I would like to get some help from you guy in a situation that I have
found myself in.
I am looking for some small solenoids, either air or electronic ones,
that can create around 3 or 4 pound pressure and can hold it for a

Given that David Thomson has said:
"I was contemplating how Newton supposedly discovered
gravity by an apple falling out of a tree and hitting him in the foot.
For