Natural Science Forum / Physics / Electromagnetism / August 2005

The Pentagon and the U.S. intelligence agencies called the N.S.A. [ National
Security Agency ], C.S.S. [ Central Security Service ], D.I.A. [ Defence
Intelligence Agency ], D.A.R.P.A. [ Defense Advanced Research Projects
Agency ], C.I.A. [ Central Intelligence Agency ], the D.H.S ...

1. Today's state
A recent paper (Stewart A M 2005 Angular momentum of the
electromagnetic field: the plane wave paradox resolved, Eur. J. Phys.
26 635) is very symptomatic. The author points out that, on the one

Hi everybody!! one simple question: if i want to demagnetize a magnet
using an alternating magnetic field ¿do i need that this alternating
field will be greater or equal in magnitude than magnet field to can
be demagnetized? ¿How is related  frequency of the alternating

Just wondering about things in a theoretical loss-less perfect world...
If I had an Ideal series resonant circuit (LCR), and applied power at the
resonant frequency (signal generator), would the Q Magnification cause the
voltage across the resistor (R) to continue to build to an ...