'Volt' Searchterm 'Volt' found in 3 terms [ • ] and 14 definitions [• ]Result Pages : • •
(eV) Electron volt is an energy unit defined as 1.60919 x10-19 joules (in older unit 1.60919 x10-12 erg). One electron volt is equal to the kinetic energy required to raise an electron through a potential difference of one volt (in a vacuum). The electron volt is not an SI unit but its use is valid within the International System for atomic (eV), electronic (keV), nuclear (MeV), and subnuclear processes (GeV or TeV). In medical imaging used units: MeV: One million electron volts keV: One thousand electron volts. • •
Process of conversion of continuous (analog) signals, such as the detected radiation (voltage), into numbers. This is carried out with an analog to digital converter. There are two kinds of discretization involved: the voltage is only measured (sampled) at particular discrete times and only voltages within a particular range and separated by a particular minimum amount can be distinguished. Voltages beyond this range are said to exceed the dynamic range of the digitizer.
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(A or amp) The SI base unit of electric current. Definition: Two parallel conductors, infinitely long and having negligible cross section should be placed 1 meter apart in a perfect vacuum. One ampere is the current that creates between them a force of 0.2 µN (micronewton) per meter of length. One ampere represents a current flow of 1 coulomb of charge per second. One ampere of current results from a potential distribution of 1 volt per ohm of resistance, or from a power production rate of 1 watt per volt of potential. The unit is known informally as the amp, but A is its official symbol and is named for the French physicist André-Marie Ampère. See also System International. Result Pages : |