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Kolbe electrometer, precision form of gold-leaf instrument. This has a light pivoted aluminum vane hanging next to a vertical metal plate. When charged the vane is repelled by the plate and hangs at an angle. An electrometer is an electrical instrument for measuring electric charge or electrical potential difference. [1]
An electroscope can only give a rough indication of the quantity of charge; an instrument that measures electric charge quantitatively is called an electrometer. The electroscope was the first electrical measuring instrument. The first electroscope was a pivoted needle (called the versorium), invented by British physician William Gilbert around ...
Its outside surface is connected by a wire to a sensitive electric charge detector. Faraday used a gold-leaf electroscope, but modern demonstrations often use a modern electrometer [9] because it is far more sensitive than an electroscope, can distinguish between positive and negative charge, and gives a quantitative readout. [13]
Electrical charge by the means of electrometer; Partial discharge measurement; Magnetic field by the means of Hall sensor; Electric field; Electrical power by the means of electricity meter; S-matrix by the means of network analyzer (electrical) Electrical power spectrum by the means of spectrum analyzer; Measurable dependent electrical ...
A quartz fiber dosimeter, sometimes called a self indicating pocket dosimeter (SIPD) or self reading pocket dosimeter (SRPD) or quartz fibre electrometer (QFE), is a type of radiation dosimeter, a pen-like device that measures the cumulative dose of ionizing radiation received by the device, usually over one work period. It is clipped to a ...
Devised in 1978 by Cresson Kearny, the Kearny fallout meter is an application of the gold-leaf electroscope developed in 1787 by Abraham Bennet. [3] Prior to this, the use of the electrometer principle for radiation detection had seen widespread application in the form of the quartz fiber dosimeter. Professional radiation meters, while more ...
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In 1748, Nollet invented one of the first electrometers, the electroscope, which showed electric charge using electrostatic attraction and repulsion. Nollet is reputed to be the first to apply the name "Leyden jar" to the first device for storing electricity. Nollet's invention was replaced by Horace-Bénédict de Saussure's electrometer in 1766.
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