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Updated: Aug 20, 2026

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera
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Published on: January 30, 2020

Environmental monitoring of static magnetic fields around operating high-voltage direct-current transmission

Fumiaki Kawabe1, Shinichi Muroya1, Chiyoji Ohkubo1

  • 1Japan EMF Information Center, 2-9-11 Shiba, Minato-ku, Tokyo 105-0014, Japan.

Radiation Protection Dosimetry
|August 18, 2026
PubMed

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A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
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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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