gold leaf electroscope

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• Electroscope — An electroscope is an early scientific instrument that is used to detect the presence and magnitude of electric charge on a body. It was the first electrical measuring instrument. The first electroscope, a pivoted needle called the versorium ,… …   Wikipedia

• electroscope — [ē lek′trō skōp΄, ilek′trō skōp΄; ē lek′trə skōp΄, i lek′trəskōp΄] n. an instrument for detecting very small charges of electricity, electric fields, or radiation: it can indicate whether they are positive or negative, as by the divergence of… …   English World dictionary

• electroscope — electroscopic /i lek treuh skop ik/, adj. /i lek treuh skohp /, n. a device for detecting the presence and determining the sign of electric charges by means of electrostatic attraction and repulsion, often between two pieces of gold leaf enclosed …   Universalium

• electroscope — An instrument for the detection of electrical charges or ionization of gas by beta or x rays; consists of two strips of gold leaf suspended from an insulated conductor and enclosed in an airtight container viewed with a low power microscope.… …   Medical dictionary

• electroscope — e•lec•tro•scope [[t]ɪˈlɛk trəˌskoʊp[/t]] n. elm a device for detecting the presence and determining the sign of electric charges by means of electrostatic attraction and repulsion, often between two pieces of gold leaf enclosed in a glass walled… …   From formal English to slang

• electroscope —   n. instrument determining electric charge and nature of it, especially by diverging gold leaf strips, etc …   Dictionary of difficult words

• Electrometer — An electrometer is an electrical instrument for measuring electric charge or electrical potential difference. There are many different types, ranging from historical hand made mechanical instruments to high precision electronic devices. Modern… …   Wikipedia

• electromagnetism — /i lek troh mag ni tiz euhm/, n. 1. the phenomena associated with electric and magnetic fields and their interactions with each other and with electric charges and currents. 2. Also, electromagnetics. the science that deals with these phenomena.… …   Universalium

• Photoelectric effect — The photoelectric effect is a quantum electronic phenomenon in which electrons are emitted from matter after the absorption of energy from electromagnetic radiation such as x rays or visible light.cite book | title = Physics for Scientists… …   Wikipedia

• Electrostatic induction — is a redistribution of electrical charge in an object, caused by the influence of nearby charges. [cite web last = first = authorlink = coauthors = title = Electrostatic induction work = Encyclopaedia Britannica online publisher = Encyclopaedia… …   Wikipedia

• Abraham Bennet — FRS (baptised 20 December 1749 buried 9 May 1799) was an English clergyman and physicist, the inventor of the gold leaf electroscope and developer of an improved magnetometer. Though he was cited by Alessandro Volta as a key influence on his own… …   Wikipedia