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Electric and magnetic field expressions are derived, and the results are numerically evaluated for frequencies in the ULF/ELF bands. For convenience, some of the results are presented in a dimensionless form. A comparison is made between the electromagnetic fields produced by linear current sources of finite and infinite length, and it is shown that there is a relative enhancement in the electric field near the source of finite length. It is also found that an optimum frequency exists for the electric field produced by a linear current source of infinite length at which the field amplitude is a maximum at a fixed observation point. Some practical applications of our results are suggested."},{"label":"DOI","value":"10.1029/RS018i006p01383"},{"label":"Volume","value":"18"},{"label":"Issue","value":"6"},{"label":"Publication Date","value":"D:00 M:11 Y:1983"},{"label":"Publication Information","value":"© 1983, American Geophysical Union."}],"description":"ULF/ELF electromagnetic fields produced in a conducting medium of infinite extent by linear current sources of infinite length","sequences":[{"@type":"sc:Sequence","canvases":[{"@id":"https://iiif.quartexcollections.com/portland/iiif/ae0f593e-3af7-4f76-b94a-6570a3a35ba2/canvas/_1","@type":"sc:Canvas","label":"ULF_ELF electromagnetic fields produced in a conducting medium 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