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What (who) is Electrograph - definition
INSTRUMENT FOR MEASURING ELECTRIC CHARGE
Electrograph
Electrograph
·add. ·noun A cinematograph using the arc light.
II. Electrograph ·noun A mark, record, or tracing, made by the action of electricity.
III. Electrograph ·add. ·noun An image made by the Rontgen rays; a sciagraph.
IV. Electrograph ·add. ·noun An apparatus, controlled by electric devices, used to trace designs for etching.
V. Electrograph ·add. ·noun An instrument for the reproduction at a distance of pictures, maps, ·etc., by means of electricity.
electrometer
[??l?k'tr?m?t?]
¦ noun Physics an instrument for measuring electrical potential without drawing any current from the circuit.
Derivatives
electrometric adjective
electrometry noun
Electrometer
·noun An instrument for measuring the quantity or intensity of electricity; also, sometimes, and less properly, applied to an instrument which indicates the presence of electricity (usually called an electroscope).
Wikipedia
Electrometer
An electrometer is an electrical instrument for measuring electric charge or electrical potential difference. There are many different types, ranging from historical handmade mechanical instruments to high-precision electronic devices. Modern electrometers based on vacuum tube or solid-state technology can be used to make voltage and charge measurements with very low leakage currents, down to 1 femtoampere. A simpler but related instrument, the electroscope, works on similar principles but only indicates the relative magnitudes of voltages or charges.
