Results 221 to 230 of about 136,577 (264)

Measurements of Planetary Electric Currents

Nature, 1964
Theories of an electric current generated by the earth's magnetic field are presented. Preliminary measurements d of the current were undertaken, using telephone cables in the Pacific Ocean near Australia. Voltage at the ends of the cables, one end being earthed'' under the ocean, was measured.
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The measurement of the vertical electric current in the atmosphere

Journal of Atmospheric and Terrestrial Physics, 1962
Abstract Methods of measuring the vertical electric current in the atmosphere are discussed and a suggestion is put forward to revert to an old method of Wilson; specimen results are given and discussed.
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PiezoMUMPs microsensor for contactless measurements of DC-electrical current

2018 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), 2018
This paper presents an integrated sensor able to perform contactless measurements of DC-Electrical currents. The microsensor conceived has been designed by using the PiezoMUMPs technology which includes a piezoelectric layer and therefore allows for implementing a mechano-electric transduction principle able to convert the DC-Electrical current into a ...
Trigona C., Sinatra V., Crea G., Nania R., Ando B., Baglio S.   +5 more
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The development of the conception and measurement of electric current

Annals of Science, 1937
(1937). The development of the conception and measurement of electric current. Annals of Science: Vol. 2, No. 2, pp. 164-178.
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Surface Current Measurements with an Electric Probe

IEEE Transactions on Microwave Theory and Techniques, 1962
The use of an electric probe for measurement of induced surface currents on obstacles in a parallel plate region is described. An analysis of the sources of error, and in particular the interaction of the probe with the obstacle, is examined theoretically and experimentally. It is concluded that the technique is capable of yielding measurements of good
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Measuring Electrical Current: The Roads Not Taken

The Physics Teacher, 2011
Recently I wrote about the standard Weston meter movement1,2 that is at the heart of all modern analogue current measurements. Now I will discuss other techniques used to measure electric current that, despite being based on valid physical principles, are largely lost in technological history.
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A device for measuring electric current

2018
A device (1) for measuring electric current comprised of a plurality of magnetic field sensor elements (2, 2.1, 2.2,..., 2.n) positioned around a current carrying conductor, where each sensor element is sensitive to one vector component of the magnetic field generated by the electric current, where the sensor elements (2, 2.1, 2.2,..., 2.n) are ...
Rolf Disselnkötter, Roberto Ottoboni, Sergio Toscani   +2 more
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Electrical measurements on soil with alternating currents

Institution of Electrical Engineers - Proceedings of the Wireless Section of the Institution, 1934
The electrical properties of the earth play an important part in many modern applications of physics and electrical engineering. In the early portion of this paper a summary is given of the published information on the electrical properties of soil for alternating currents at frequencies from 50 to nearly 200 million cycles per sec. Particular interest
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Zeptoampere electric current measurements with molecular tagging

Chemical Physics, 2018
Abstract A novel method of measuring concentrations of ionized molecules in gases that enables detection of individual ionized molecules by means of tagging them with readily detectable nano-objects has been recently discovered and developed. The femtoampere detection level of this method has been demonstrated.
B. Gorbunov, M. Burton, S.M. Paling
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Current Density Measurements in Atmospheric Electricity

Nature, 1967
IN 1929, Watson1 pointed out that very close to the surface of the Earth the atmospheric electric current, in normal fine weather field, is carried only by positive ions, so that the current density can be computed from where J is the density of the current from ionosphere to Earth, Es is the electric field at the surface, and λ+s is the conductivity ...
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