What are Electric and Magnetic Fields?
Compiled by George Parker ©
Since the introduction of wireless technology (1990s), the term “EMF” has been used in a contradictory expression of words. It reflects a person’s lack of knowledge and understanding of the basic physical science of EMF. They use the term to produce a special effect, something like “wise fool” or “legal murder”, which is an oxymoron. The misuse needs to be brought to the attention to purge half-truths. I am not splitting hairs or nit picking, but bringing attention to the true authorized term that has been bastardised by uninformed (lay) people.
Before wireless technology was introduced in the 1990s, EMF was used to describe “ELECTRIC and MAGNETIC fields (EFs & MFs)” of electricity, but for some unknown reason the term was changed to “ELECTROmagnetic fields” by lay people who didn’t understand the physical science of EMF.
I have asked many sufferers what EMFs mean to them and most say: “It means wireless radiation and fields and cell phones”, this belief is incorrect! Wireless radiation emitted from cell phones and other wireless devices, appliances, tools and equipment is “microwave non-ionized radiation” that is part of the “radio frequency radiation (RFR)” of the frequency spectrum and isn’t an “electromagnetic field”.
EFs and MFs are known as “electricity and magnetism” and are demonstrated by a single underlying source that produces an “electromagnetic force (EMF)”, which is the Dictionary terminology of EMF. Note that it’s a “FORCE” and not a “FIELD”. Electromagnetism is a branch of physical science that describes the interactions of electricity and magnetism, both as separate phenomena and as a singular “electromagnetic FORCE (EMF)” that produces a potential energy.
The authorized term “electromotive FORCE (EMF)” was used as an instructional term to define the potential energy produced by a source of “extremely low frequency (ELF)” and “radio frequency radiation (RFR)” within in a human body or a car battery. “ELECTRIC magnetic fields (EMF) (EFs & MFs)” was used to teach the facts of “electricity and magnetism theory” that primarily discusses the relationships between EFs and MFs based on observations and experiments related to electricity and magnetism. MFs are created by a moving “electric current, (Amps)” and at the same time MF can induce movement of charges producing an “electric current”.
Electromagnetism is the theory of an underlying force (etheric force) that was published by Scottish physicist James Clerk Maxwell of electricity and magnetism in 1865 that allows a deeper understanding of the physical science of “electromotive force” and “electric magnetic field”—both known as EMF.
Prior to the 1990s, the term EMFs was a general term used by civilian and military teaching within the telecommunications network! EMF defined “electric and magnetic fields (EFs & MFs), which are part of the “extremely low frequency (ELF)” of the non-ionized radiation frequency spectrum. Since the introduction of wireless technology in the latter part of the 1990s, the term has been vocalized by lay people as “electromagnetic fields” instead of “electric-magnetic field”. The authorized term for EMF is defined in the Concise English Dictionary as “electromotive force”, which will be explained at a later date.
The American electric power system operates at 6o hertz (Hz) and British on 50Hz. EFs and MFs are not considered as “radiation”, but as “fields”, and that is for various technical reasons, and not “hair-splitting” or “nit-picking” as some may believe. But the “electric fields (EFs)” and “magnetic fields (MFs)” are within the lower frequencies of the “frequency spectrum” of “non-ionizing radiation (NIR)”. Often, red herrings are thrown in by people who wish to derail discussions, such as: ultraviolet light, visible light and sunlight.
The main essence of this article is to produce a simple knowledge and understanding of ELF that is part of “electromagnetic radiation (EMR)”.
EFs and MFs may appear in
combination or alone.
EFs exist whenever there is a “positive (+)” or “negative (-)” electrical charge present and are created by differences in “voltage (V)”: the higher the voltage, the stronger will be the resultant EF that is measured in “volts per metre (V/m)”. Any electrical wire that is charged will produce an associated EF, and will exist even when there is no “current (amps per metre – A/m)” flowing. The higher the voltage, the stronger the EF will be at a given distance from the wire.
EFs are stronger when close to a charge or charged conductor, and their strength rapidly diminishes with distance from it. Conductive metal shield (Mu metal), which is nickel–iron soft ferromagnetic alloy with very high permeability that is used for shielding sensitive electronic equipment against static or ELF. Other materials, such as building materials and trees, provide some shielding capability. Therefore, the EFs from power lines outside the house may be reduced by walls, buildings, and trees. When power lines are buried in the ground, the EFs at the surface are hardly detectable. But, these days, there is so much shoddiness in electrical devices, appliances, tools and equipment, these rules are difficult to apply.
MFs are created when electric current flows and the strength of the MF is measured in “amperes per meter (A/m)”: the greater the current, the stronger the MF; and is measured in “milliGauss (mG)” or “microTesla (µT) or milliTesla (mT). If current does flow, the strength of the MF will vary with power consumption but the EF strength will be constant. MF is only produced once a device is switched “ON” and current flows and the higher the current, the greater the strength of the MF. Like EFs, MFs are strongest close to their origin and rapidly decrease at greater distances from the source. MFs are not blocked by common materials such as the walls of buildings.