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Related Concept Videos

Electromagnetic Fields01:30

Electromagnetic Fields

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Electric fields generated by static charges, often referred to as electrostatic fields, are characteristically different from electric fields created by time-varying magnetic fields. While the former is a conservative field, implying that no net work is done on a test charge if it goes around in a complete loop in the field, the latter is, by definition, not a conservative field; net work is done, and it is proportional to the rate of change of magnetic flux.
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The Electromagnetic Spectrum02:37

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The electromagnetic spectrum consists of all the types of electromagnetic radiation arranged according to their frequency and wavelength. Each of the various colors of visible light has specific frequencies and wavelengths associated with them, and you can see that visible light makes up only a small portion of the electromagnetic spectrum. Because the technologies developed to work in various parts of the electromagnetic spectrum are different, for reasons of convenience and historical...
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The Electromagnetic Spectrum01:24

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Electromagnetic waves are categorized according to their wavelengths and frequencies, giving the electromagnetic spectrum. These waves are classified as radio, infrared, ultraviolet, etc. Radio waves refer to electromagnetic radiation with wavelengths ranging from millimeters to kilometers. Radio waves are commonly used for audio communications (i.e., radios) and typically result from an alternating current in the wires of a broadcast antenna. They cover a broad wavelength range and are used...
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Electromagnetic Waves01:30

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James Clerk Maxwell formulated a single theory combining all the electric and magnetic effects scientists knew during that time, calling the phenomena his theory predicted “Electromagnetic waves”. He brought together all the work that had been done by brilliant physicists such as Oersted, Coulomb, Gauss, and Faraday and added his own insights to develop the overarching theory of electromagnetism. Maxwell’s equations, combined with the Lorentz force law, encompass all the laws...
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The existence of combined electric and magnetic fields that propagate through space as electromagnetic (EM) waves is the most significant prediction of Maxwell's equations. As Maxwell's equations hold in free space, the predicted electromagnetic waves do not require a medium for their propagation. An EM wave comprises an electric field, defined as the force per charge on a stationary charge, and a magnetic field, which is the force per charge on a moving charge.
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Plane Electromagnetic Waves II01:29

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Consider a plane wavefront traveling in position x-direction with a constant speed. This wavefront can be utilized to obtain the relationship between electric and magnetic fields with the help of Faraday's law.
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Occupational exposure to electromagnetic fields. The situation in Greece.

G A Gourzoulidis1, P Tsaprouni2, Ν Skamnakis2

  • 1Hazardous Agents Department, OHS Directorate, Hellenic Ministry of Labor, Greece; Department of Medical Physics, University of Thessaly, Larissa, Greece.

Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)
|June 6, 2018
PubMed
Summary

Occupational exposure to electromagnetic fields (EMF) assessments show most workplaces comply with safety limits. However, maintenance procedures pose risks, highlighting the need for accurate hazard assessment and adherence to the EMF Directive.

Keywords:
Directive 2013/35/EUElectromagnetic fields (EMF)Occupational exposureOccupational health & safety (OHS)

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Area of Science:

  • Occupational Health and Safety
  • Electromagnetic Field (EMF) Exposure

Background:

  • Occupational exposure to electromagnetic fields (EMF) is a significant OHS issue.
  • European Directive 2013/35/EU addresses EMF exposure management.
  • Practical implementation of this directive is crucial for workplace safety.

Purpose of the Study:

  • To examine the practical implementation of the European Directive 2013/35/EU.
  • To assess occupational EMF exposure in various work environments.
  • To identify potential risks and challenges in EMF management.

Main Methods:

  • Conducted extensive EMF measurements and exposure assessments.
  • Performed exposure mapping and identified high-risk areas ('hot spots').
  • Evaluated specific workplaces including power production, railways, broadcasting, MRI, industrial, research, and offices.

Main Results:

  • Most EMF assessments indicated no occupational overexposure; general public limits were also not exceeded.
  • Localized overexposures were manageable through technical and organizational OHS measures.
  • Maintenance procedures for EMF-emitting equipment revealed significant overexposure risks.

Conclusions:

  • The study clarifies the occupational EMF environment, identifying areas with potential high exposures.
  • Accurate risk assessment requires precise exposure identification and understanding of EMF hazards.
  • Challenges include overestimating general exposure while underestimating maintenance risks, necessitating careful application of the Directive's complex limits.