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electroscope    
n. 驗電器

驗電器

electroscope
驗電器

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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英文字典中文字典相關資料:
  • 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 scientific instrument used to detect the presence and magnitude of electric charge on a body It has been a crucial tool in the field of electrostatics since its invention in the 18th century
  • Electroscope | Charge Detection, Electric Field, Induction | Britannica
    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
  • 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 Principle, Types, and Uses Explained (2025) - Vedantu
    An electroscope is a physics instrument used to detect the presence and nature of electric charge on a body It helps to determine if an object is charged and can sometimes indicate the type (positive or negative) of charge
  • Understanding the Electroscope: A Comprehensive Guide
    What Is an Electroscope and How Does It Work? An electroscope is a device used to detect the presence and magnitude of electric charge It operates on the principle that like charges repel each other
  • Electroscope | Harvard Natural Sciences Lecture Demonstrations
    The electroscope, or electrometer, is an instrument that measures electric charge or voltage by means of repulsive electrostatic force We generally use two types of electroscope: a small "gold-leaf" type and a larger
  • 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
  • Electroscope: Definition, Diagram, Working, Types,Experiment,Uses
    An electroscope is a device used to detect the presence of an electric charge on any type of body Learn its diagram, working, experiment, types, and uses here





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