effect of exposure to electric and magentic

effect of exposure to electric and magentic - Health Canada...

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Health Canada Santé Canada The Issue There are concerns that daily exposure to elec tric and magnetic fields (EMFs) may cause health problems. These concerns are reflected in a number of reports that have attempted to link EMF exposure to a variety of health issues, including childhood cancer. Background Electricity plays a central role in modern society. It is used to light homes, prepare food, run computers and operate other household appliances, such as TVs and radios. In Canada, appliances that plug into a wall socket use electric power that flows back and forth at a frequency of 60 cycles per second (60 hertz). Every time you use electricity and electrical appliances, you are exposed to electric and magnetic fields (EMFs) at extremely low fre quencies (ELF). The term “extremely low” is used to describe any frequency below 300 hertz. EMFs produced by the transmission and use of electricity belong to this category. Electric and Magnetic Fields (EMFs) Electric and magnetic fields are invisible forces that surround electrical equipment, power cords, and wires that carry electricity, including outdoor power lines. You cannot see or feel EMFs. Electric Fields: These are formed whenever a wire is plugged into an outlet, even when the appliance is not turned on. The higher the volt age, 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. Electric and magnetic fields can occur sepa rately or together. For example, when you plug the power cord for a lamp into a wall socket, it creates an electric field along the cord. When you turn the lamp on, the flow of current through the cord creates a magnetic field. Meanwhile, the electric field is still
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This note was uploaded on 10/19/2010 for the course EE 147 taught by Professor Eric during the Spring '10 term at ITT Tech Flint.

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effect of exposure to electric and magentic - Health Canada...

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