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Natural Science Forum / Physics / Electromagnetism / May 2007



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ThreadLast Post  Replies
precise direction of a radio signal?30 May 2007 05:25 GMT4
Is it possible to determine the direction of a radio signal instantly,
i.e. without having to sweep some directional antenna?  Perhaps by using
several orthogonal antennas, for example?
If it helps, here's the particular application I have in mind: I'm
New Electricity26 May 2007 09:55 GMT2
New Electricity
Magnetic Field Due to Current
The model proposed by Maxwell that relies on the current loop and is worked out by Gauss an example of fluid mechanics (to make the mathematics beautiful and easy), and is based around the Pythagorean philosophy of perfection is not ...
How to measure a highly intense Alternating Mag Field of 100kHz and 200Gs?25 May 2007 11:33 GMT3
Dears
I've got an intense mag-field (f=100kHz, amplitude=200Gs),
but no suitable detectors could be applied to it to make an acuurate
measurement.
high school physics problem23 May 2007 07:59 GMT3
Power is generated at 24kV at a generating plant located 118 km from a
town that requires 50 MW of power at 12 kV. Two transmission lines
from the plant to the town each have a resistance of 0.10 Ohm/km. What
should the output voltage of the transformer at the generating plant
Mind Control Weapons and Directed Energy Weapons16 May 2007 07:22 GMT1
Mind Control Weapons and Directed Energy Weapons
Do you know Mind Control Weapons and Brain Washing (such as CIA Mind
Control Project : MKULTRA) ? Do you know voice can be transmitted to
human's head from long distance(V2K)? (In 2002, the Air Force Research
On the interaction between free electrons and EM radiation11 May 2007 22:54 GMT4
Are free electrons invisible? I conducted the thought-experiment wherein
an electron orbiting a nucleus is energized by radiated EM such as for
example visible light, sending it into a higher orbit around the nucleus.
My conclusion was that the energy isn't stored in the electron ...
rotating magnetic field09 May 2007 17:01 GMT8
For simplicity, and as a starting point,
let's assume I know how triphase
asynchronous motors do work.
Well, idealizing like in a gedanken,
Theories on Electromagnetism08 May 2007 01:08 GMT16
I was pondering to myself why light moves. If a photon has not mass
and no known force pushing it then why does it move?
The speed of light is known to be 186,282,397 miles per second.
But why is it this speed and not, for example 197,527,698 mps?
HF transformer core losses reduce with reduction in magnetization path07 May 2007 11:25 GMT1
I have two Metglas C cores forming a high frequency transformer O
core.    I found that wrapping primary and secondary windings on the
same bobbin as opposed to wrapping them on separate bobbins on
opposite sides of the core has a profound improvement in transformer
Circularly polarized light produces antisymmetric stress components when absorbing01 May 2007 18:08 GMT1
This is shown in the paper "Spin_produces_stress" (www.sciprint.org).
Besides, it is shown that the total torque acting on the absorber
equals two powers divided by the frequency. This fact contradicts the
standard electrodynamics, which predicts the torque equals power
 
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