tailieunhanh - Electric and Magnetic Fields FACTS

Today, research and technology play a decisive role for the European food sector for the development of new products as well as for improved safety measures. In July 2000, DG RTD requested a study on potential future European research priorities in food technology and food safety from the Institute for Prospective Technological Studies (IPTS), Joint Research Centre. The study design comprised the involvement of external expertise from industry as well as from academia: The results of the study were derived from two experts workshops held in Sevilla at the IPTS in December 2000 and May 2001. . | Electric and _ Magnetic Fields FACTS NEXT PAGE WESTERN AREA POWER ADMINISTRATION EMF Units Electromagnetic Spectrum Electric Fields Usually measured in volts per meter V m For large fields the units usually used are 1 kilovolt per meter kV m 1 000 volts per meter Magnetic Fields Usually measured in milliGauss mG Other units sometimes used 1 microTesla 10 milliGauss 1 Amp meter milliGauss Direct current 15-30. kHz and 50-90 Hz 60 Hz 10- 10- HZ Frequency is shown in Hertz Hz . 1 Hz 1 cycle per second. Note that 104 meanS 10x10x10x10 10 000 Hz etc. kHz kilohertz 1000 Hz MHz megahertz million Hz. NEXT PAGE PREVIOUS PAGE Electric power lines are familiar to all of us. They have different shapes different sized poles and varying numbers of wires. We may not be able to guess how much power they carry but we all know what they do they bring electric power to our homes and businesses. Many of the dramatic improvements in health safety and quality of life that we benefit from today could not have happened without a reliable and affordable electric supply. But could electricity be bad for our health Electric and magnetic fields are present wherever electricity is used. Do these fields cause cancer or any other diseases as some have suggested These important and serious questions have been investigated thoroughly during the past three decades. Several tens of millions of dollars have been spent worldwide. Research on EMF still continues because no clear answers have been found. The balance of scientific evidence to date indicates that these fields do not cause disease. This discussion outlines the EMF issue summarizes the research conducted to date and describes what Western Area Power Administration is doing to address concerns about EMF. 1 NEXT PAGE PREVIOUS .