Re: Tesla Coil RF Transmitter

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: stork <stork@xxxxxxxxxxxxxxxxxxx>

Hi Steve,

> Again, if you don't believe in displacement current, you still have 
> to explain how electrostatic forces can do mechanical work.

It's not difficult.

F = qE          Lorentz Force Law.  Defines an E field really.

dW = F.dl       dl is distance moved related to work differential,dw.

dW = qE.dl      E.dl is a scalar product.
                E has only a single component
                        in the radial direction to q whereas dl has 
a component                 in the radial direction also, but may 
have components in                other directions perpendicular to 
the radial direction.                 E has no effect on componts 
perpendicular to r (dot                             product reduces 
to zero) so this reduces to:

dW = qEdr

W = q INTG Edr  Integrating we have total work done by E in the 
radial                          direction (longitudinal direction in 
our experiment) on                         q.

If you agree
> that there can be no electrical power without voltage and current 
> being present at once, then you must admit that there can be no 
> mechanical work without E x H. So if you are able to move a 
> non-conducting object using an electrostatic field, displacement 
> current must exist. That is my argument and I'm still waiting to see 
> a counter argument.

Of course, I don't agree.  See above. You'll note there is no 
dispalcement current and work is performed by an E field on q.  In 
electrostatics there is no need for E X H or magnetic fields to do work.


>  >No one can experimentally measure a magnetic field produced by 
> a  >"dispalcement current" in a dielectric field.
> Explain how the balloon pulls up to the ceiling and sticks to it 
> after rubbing on the cat, then. If mechanical work was performed, 
> there must be both E and H fields present, and the only thing that 
> could have created the H is displacement current since there are no 
> conductors present to carry conduction current.

Again, no need to invoke E and H fields and displacement currents.
Coulomb's Law easily suffices here.

F = (1/4piEo)q1q2/r^2

This is just a simple example of triboelectrification and attraction 
of oppositely charged bodies.

Stork