Authors :
Dr. Ismail Abbas
Volume/Issue :
Volume 7 - 2022, Issue 3 - March
Google Scholar :
https://bit.ly/3IIfn9N
Scribd :
https://bit.ly/3v2BUtb
DOI :
https://doi.org/10.5281/zenodo.6418068
Abstract :
Poynting's vector theorem P=ExH is one of
the universal laws of physics that applies to
electromagnetic fields in AC and DC circuits. A rigorous
analysis of two arbitrary cases of DC and AC circuit
electromagnetic fields shows that Poynting's law P=ExH
applies to both station ary and time-varying
electromagnetic fields.
Keeping the generality, we analyze two simple cases
of time-varying and stationary fields of a regular
cylindrical wire carrying direct or alternating current
where in both cases the electromagnetic energy flow
calculations validate the hypothesis that the theorem of
Poynting is absolute. Moreover, the interpretation of the
results also suggests that the photons of light beams or
electromagnetic field bundles cannot live forever, they
do not have an infinite but a finite lifespan because they
can be created or annihilated during their interaction
with free or bound charges such as electrons.
Poynting's vector theorem P=ExH is one of
the universal laws of physics that applies to
electromagnetic fields in AC and DC circuits. A rigorous
analysis of two arbitrary cases of DC and AC circuit
electromagnetic fields shows that Poynting's law P=ExH
applies to both station ary and time-varying
electromagnetic fields.
Keeping the generality, we analyze two simple cases
of time-varying and stationary fields of a regular
cylindrical wire carrying direct or alternating current
where in both cases the electromagnetic energy flow
calculations validate the hypothesis that the theorem of
Poynting is absolute. Moreover, the interpretation of the
results also suggests that the photons of light beams or
electromagnetic field bundles cannot live forever, they
do not have an infinite but a finite lifespan because they
can be created or annihilated during their interaction
with free or bound charges such as electrons.
