Electric and Magnetic Fields

brothersroocooElectronics - Devices

Oct 18, 2013 (3 years and 11 months ago)

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Electric and Magnetic Fields
EMFs
Electromagnetic Fields
Electromagnetic fields of all frequencies
represent one of the most common and
fastest growing environmental influences,
about which anxiety and speculation are
spreading. All populations are now exposed to
varying degrees of EMF, and the levels will
continue to increase as technology advances.

Electric and magnetic fields (EMFs) are invisible lines of force.

High
-
voltage transmission lines, secondary power lines, and home
wiring and lighting.

Electric and magnetic fields also arise from the motors and heating
coils found in electronic equipment and appliances.

Magnetic Field of iron filings.

High magnetic permeability causes there
magenetic
fields to concentrate
at their ends.

The mutual attraction of opposite poles then results in the formation of
elongated clusters of filings along the field lines.
name
used by
magnetic flux density
electrical engineers
magnetic induction
applied
mathematicians
electrical engineers
magnetic field
physicists
NIEHS Report to Congress

1993 Electric
and
Magnetic Fields
Research and
Public
information Dissemination
(EMF RAPID)
Program

Six
-
year
project with the goal of providing scientific evidence
to determine whether exposure
to power
-
frequency EMF
involves a potential risk to human
health (50 or 60 Hz)

EMF, 50 or 60 Hz, carries very little energy, has no ionizing
effects, and usually has no thermal effects

WHO Reported in 1998 EMF Range of 0
-
300Ghz had no
adverse health effects

Weak association with incidence Childhood
Leukemia

Few studies on adults show no association
with the development of adult cancers and
residential EMFs

NIEHS recommends continued education on
practical ways to reduce exposure
NIEHS Report to Congress
The weight of scientific evidence has
not conclusively linked cell phones
with any health problems. Additional
research is needed. The NTP is
conducting studies on radiofrequency
radiation emitted by cell phones.
http://www.niehs.nih.gov/health/docs/cell
-
phone
-
fact
-
sheet.pdf
Radio Frequency (RF) Fields