ground resistivity

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• Ground (electricity) — In electrical engineering, ground or earth may be the reference point in an electrical circuit from which other voltages are measured, or a common return path for electric current, or a direct physical connection to the Earth. A typical earthing… …   Wikipedia

• Electrical resistivity tomography — (ERT) or electrical resistivity imaging (ERI) is a geophysical technique for imaging sub surfaces structures from electrical measurements made at the surface, or by electrodes in one or more boreholes. It is closely related to the medical imaging …   Wikipedia

• High Voltage Isolation and Ground Potential Rise — This article outlines the principles of High Voltage Isolation (HVI) and Ground Potential Rise (GPR). Most often questions of concern arise to anyone associated with the use of any communication signal (analog or digital) via a metallic or fiber… …   Wikipedia

• High Voltage Protection and Isolation of telecommunications circuits and SCADA circuits to and from Hydro Sub Stations — High Voltage Protection and Isolation of telecommunications circuits and SCADA circuits to and from Hydro Sub StationsIn order to protect the continuous service of important telecommunications and control circuits to and from Hydro Sub Stations,… …   Wikipedia

• Earth exploration — Introduction   the investigation of the surface of the Earth and of its interior.  By the beginning of the 20th century most of the Earth s surface had been explored, at least superficially, except for the Arctic and Antarctic regions. Today the… …   Universalium

• Magnetotellurics — Magnetotelluric station Magnetotellurics (MT) is an electromagnetic geophysical method of imaging the earth s subsurface by measuring natural variations of electrical and magnetic fields at the Earth s surface. Investigation depth ranges from… …   Wikipedia

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• Formation evaluation — In petroleum exploration and development, formation evaluation is used to determine the ability of a borehole to produce petroleum. Essentially, it is the process of recognizing a commercial well when you drill one .Modern rotary drilling usually …   Wikipedia

• electricity — /i lek tris i tee, ee lek /, n. 1. See electric charge. 2. See electric current. 3. the science dealing with electric charges and currents. 4. a state or feeling of excitement, anticipation, tension, etc. [1640 50; ELECTRIC + ITY] * * *… …   Universalium

• Earth potential rise — In electrical engineering, Earth Potential Rise (EPR) also called Ground Potential Rise (GPR) occurs when a large current flows to earth through an earth grid impedance. The potential relative to a distant point on the Earth is highest at the… …   Wikipedia

• Soil — For other uses, see Soil (disambiguation). A represents soil; B represents laterite, a regolith; C represents saprolite, a less weathered regolith; the bottommost layer represents bedrock …   Wikipedia