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electroscope    
n. 验电器

验电器

electroscope
验电器

electroscope
n 1: measuring instrument that detects electric charge; two gold
leaves diverge owing to repulsion of charges with like sign

Electroscope \E*lec"tro*scope\, n. [Electro- -scope: cf. F.
['e]lectroscope.] (Physics)
An instrument for detecting the presence of electricity, or
changes in the electric state of bodies, or the species of
electricity present, as by means of pith balls, and the like.
[1913 Webster]

{Condensing electroscope} (Physics), a form of electroscope
in which an increase of sensibility is obtained by the use
of a condenser.
[1913 Webster]


Cinematograph \Cin`e*mat"o*graph\, n. [Gr. ?, ?, motion
-graph.]
1. an older name for a {movie projector}, a machine,
combining magic lantern and kinetoscope features, for
projecting on a screen a series of pictures, moved rapidly
(25 to 50 frames per second) and intermittently before an
objective lens, and producing by persistence of vision the
illusion of continuous motion; a moving-picture projector;
also, any of several other machines or devices producing
moving pictorial effects. Other older names for the {movie
projector} are {animatograph}, {biograph}, {bioscope},
{electrograph}, {electroscope}, {kinematograph},
{kinetoscope}, {veriscope}, {vitagraph}, {vitascope},
{zoogyroscope}, {zoopraxiscope}, etc.

The cinematograph, invented by Edison in 1894, is
the result of the introduction of the flexible film
into photography in place of glass. --Encyc. Brit.
[Webster 1913 Suppl.]

2. A camera for taking chronophotographs for exhibition by
the instrument described above.
[Webster 1913 Suppl.]


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  • Electroscope - Wikipedia
    The electroscope is an early scientific instrument used to detect the presence of electric charge on a body It detects this by the movement of a test charge due to the Coulomb electrostatic force on it
  • Electroscope - Electricity - Magnetism
    An electroscope is a device used to detect electric charge, featuring a metal rod or plate, suspension system, enclosed container, and insulating support Understanding the Electroscope: A Journey Through History and Function
  • What is an Electroscope? - BYJUS
    An electroscope is a scientific device that is used to detect the presence of an electric charge on a body In the year 1600, British physician William Gilbert invented the first electroscope with a pivoted needle called versorium
  • Electroscope | Charge Detection, Electric Field, Induction . . .
    electroscope, instrument for detecting the presence of an electric charge or of ionizing radiation, usually consisting of a pair of thin gold leaves suspended from an electrical conductor that leads to the outside of an insulating container
  • Electroscope | Precision, Charge Detection Experiment
    An electroscope is a simple yet powerful device used to detect electric charges Its operation is based on the principles of electrostatics, a branch of physics that studies stationary electric charges or charges at rest
  • What is electroscope in physics? - Physics Network
    Electroscope measures a charge that is dependent on the Coulomb electrostatic force that triggers the movement of the test charge Electroscopes are often considered as basic voltmeter because the electrostatic charge of an object is adequate to its capacitance
  • What is an Electroscope and How is it Used? - AP PGECET
    An electroscope is a nifty little device that allows us to detect and measure the presence of electric charges It works on the principle of electric conduction and is especially handy for illustrating static electricity
  • Electroscopes - SparkMuseum
    The term electroscope is given to instruments which serve two primary purposes: 1) to determine if a body is electrified, and 2) to determine the nature of the electrification An electrometer, on the other hand, is a specialized form of electroscope that includes a calibrated scale for reading the strength of the charge *
  • Electroscope - Definition, Working Principle, Types Uses
    Invented by the British physician William Gilbert around 1600, the electroscope is one of the most important instruments used by scientists for the past many years to study electricity





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