Electric Fields
These are formed whenever a wire is plugged into an outlet, even when the appliance is not turned on. The higher the voltage, the stronger the electric field. | | | Magnetic Fields
These are formed when electric current is flowing within a device or wire. The greater the current, the stronger the magnetic field. | | | Strength of EMFs
EMFs are strongest when close to their source. As you move away from the source, the strength of the field fades rapidly. When indoors, the magnetic fields from outside sources are weaker than those from household electrical appliances. |
Electric and magnetic fields (EMFs) are forces that surround electrical equipment, power cords and wires that carry electricity, including overhead and underground power lines. You cannot see or feel EMFs. Every time you use electricity and electrical appliances you are exposed to EMFs. Public and scientific concerns have been expressed over the possibility that EMFs, associated with every day use of electricity, could be a health risk. Health Canada monitors scientific research on EMFs and reports that EMFs from electrical devices and power lines can cause weak electrical currents to flow through the human body. However these currents are much smaller than those produced naturally by your brain, nerves and heart, and are not associated with any known health risks. At present there are no Canadian government guidelines for exposure to EMFs. For more information, visit the Health Canada website. |
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