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Topic: Electrophorus

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Electric charge

Electricity

Alessandro Volta

Induction motor

Nikola Tesla

George Westinghouse

	Electrophorus - LoveToKnow 1911
		ELECTROPHORUS, an instrument invented by Alessandro Volta in 1775, by which mechanical work is transformed into electrostatic charge by the aid of a small initial charge of electricity.
		His electrophorus in one form consisted of a disk of non-conducting material, such as pitch or resin, placed between two metal sheets, one being provided with an insulating handle.
		Since, however, it carries with it the charge it had when resting on the resin, its potential becomes increased as its capacity becomes less, and it therefore rises to a high potential, and will give a spark if the knuckle is approached to it when it is lifted after having been touched and raised.
	www.1911encyclopedia.org /Electrophorus (854 words)

	Electrophorus - Wikipedia, the free encyclopedia
		An electrophorus is a single-plate capacitor used to produce imbalances of electric charge via the process of electrostatic induction.
		The electrophorus was devised in the 18th century by Johannes Wilcke and Alessandro Volta.
		The electrophorus consists of a dielectric plate or 'cake' on a metal surface and a metal plate with an insulating handle.
	en.wikipedia.org /wiki/Electrophorus (201 words)

	Charging with an Electrophorus (Site not responding. Last check: 2007-10-24)
		Since electrons from the electroscope are drawn to electrophorus disk, the electroscope disk and leaf will be left with a net positive charge, the same charge as that on the electrophorus.
		The charged electrophorus disk is brought close to the fixed disk of the electroscope but the two are not allowed to touch.
		By moving the electrophorus disk away from or closer to the electroscope disk, the desired separation of the leaves can be obtained.
	www.orau.org /ptp/collection/electroscopes/electrophorus.htm (638 words)

	Electric eel - Wikipedia, the free encyclopedia
		The electric eel (Electrophorus electricus) is a species of fish.
		It is capable of generating powerful electric shocks of up to 650 volts, which it uses for both hunting and self-defense.
		Originally a species in Gymnotus, it was later given its own family Electrophoridae, and then demoted to a genus of Gymnotidae alongside Gymnotus.
	en.wikipedia.org /wiki/Electric_eel (605 words)

	Electrophorus (Site not responding. Last check: 2007-10-24)
		There are two types of electrophorus, one produces a net positive charge and the other produces a net negative charge.
		The pvc type electrophorus is dark grey in color and will produce a negative charge when rubbed.
		To get the charge off of the electrophorus a large, round metal plate with a handle is used to perform charge by induction.
	www.physics.brown.edu /physics/demopages/Demo/em/demo/5a1021.htm (382 words)

	The Electrophorus: an electrostatics demonstration with electroscope and corona point discharge accessories
		The electrophorus is ideal for generating energetic capacitive sparks required for vapor ignition demonstrations.
		Ainslie describes interesting experiments with an electrophorus that was charged in the Springtime and then its charge monitored throughout the summer [Ainslie, 1982].
		Another thing to notice is that the leaves, which spread to a wide angle when the electrode is first lifted, slowly come back together with time, indicating the leakage of electric charge, presumably due to corona discharge from the edges of the leaves.
	fys.kuleuven.be /pradem/demoproeven/electrophorus/electrophorus.html (1017 words)

	The Electrophorus (Site not responding. Last check: 2007-10-24)
		The energy for each capacitive spark drawn from the electrophorus is actually supplied by the action of lifting the electrode off the cake.
		Our electrophorus is constructed from an Aluminum pie pan, a Styrofoam plate and cup, some tape and a small Neon bulb.
		Construct an electrophorus by taping the Styrofoam cup to the center of a pie pan.
	campus.murraystate.edu /tsm/tsm118/Appendix/elecph1.htm (381 words)

	Cover Page
		These are better than what we used previously, because the electrophorus allows us to make a lot of charge, and the electroscope is much more sensitive than the hanging rods, but we couldn’t understand how they worked without what we did before.
		With the electrophorus, we will be able to manufacture sparks whenever we want, and begin to understand what those sparks we see when we take of a sweater or watch a lightning storm (lightning is a really big spark!) are, and what cause s them.
		To charge the electrophorus (which is what the do-hickey is called) I rub the cutting board with the oven bag.
	www.uark.edu /depts/physinfo/up2/k-12/sparks2.html (2187 words)

	Playing with electricity and magnets
		In this case, you will be charging the jar by contact with an electrophorus, but it is probably better to keep the whole system insulated, and to charge it by induction.
		When the electrophorus is placed on the rubber, repulsion effects cause the top of the electrophorus to have the same charge as the rubber, while the lower surface has the opposite charge.
		The principle of the electrophorus is that charge can move through a conductor like aluminium, but it cannot move through an insulator like the rubber mat.
	members.ozemail.com.au /~macinnis/scifun/elecmag.htm (1744 words)

	PIRA 5A10.00 PRODUCING STATIC CHARGE
		Describes using Lucite or polystyrene as the sole and a cylindrical electrophorus.
		Use a neon discharge tube to show a flash by holding one end on the electrophorus.
		Four demos: one illustrating the action of an electrophorus., another showing the reaction of a charged balloon to a paddle charged positive, negative, or neutral, and more.
	www.wesleyan.edu /physics/demos/pirabib/5eandm/5A10.html (537 words)

	HighBeam Encyclopedia - electrophorus (Site not responding. Last check: 2007-10-24)
		ELECTROPHORUS [electrophorus] device used to generate static electric charges.
		It has two parts: a nonconducting plate (e.g., of hard rubber) that is negatively charged and a metal plate with an insulated handle.
		Find newspaper and magazine articles plus images and maps related to "electrophorus" at HighBeam.
	www.encyclopedia.com /html/e1/electrph-us.asp (227 words)

	ELECTROPHORUS - Online Information article about ELECTROPHORUS (Site not responding. Last check: 2007-10-24)
		The study of Volta's electrophorus at once suggested the performance of these cyclical operations by some form of rotation instead of See also:
		double and reciprocal electrophorus and also made mention of the subject of multiplying condensers in a See also:
		He states, however, that the use of a condenser in connexion with an electrophorus to make evident and multiply weak charges was due to T. See also:
	encyclopedia.jrank.org /ECG_EMS/ELECTROPHORUS.html (1192 words)

	ELECTROSTATIC PROJECT: THE ELECTROPHORUS, a simple high-voltage static generator
		Next, get an easily-charged object such as a balloon, or a thick plastic sheet, plastic cutting board, styrofoam packing block, etc. Also get something that can be used to electrically charge this object through rubbing, such as a piece of (artificial) fur, a wool sweater, a wig, your hairy head or arms, etc.
		To test humidity, rub your plastic object with the fur or sweater and see if it becomes charged and makes the fur stand on end when it's held close to the charged area on the plastic.
		To operate the electrophorus, place your plastic object on a table and rub its surface with fur or wool to charge it well.
	amasci.com /emotor/electoph.html (522 words)

	UNPh32
		In a charged electrophorus, charge leaks away due to conduction of electrons by moisture on the surface of the apparatus.
		Raise an electrophorus off the plate with a helical spring touch the disc to remove induced charge and show the spring lengthens.
		This electrophorus experiment explains lightning, which is the same effect occurring on a much larger scale.
	www.uq.edu.au /_School_Science_Lessons/UNPh31.html (12771 words)

	electrophorus
		My earliest experiences with an electrophorus used a disposable pie pan and a foam plate.
		A feature of the standard electrophorus is an insulating handle on the metal part.
		The sparks you get from an electrophorus may not always be as bright and loud as those you get off a charged Leyden jar, but they can be long, indicating very high voltage.
	www.alaska.net /~natnkell/electrophorus.htm (754 words)

	Physics Resource Collection - E and M DCS (Site not responding. Last check: 2007-10-24)
		5A10.21 electrophorus, etc. Describes using Lucite or polystyrene as the sole and a cylindrical electrophorus.
		5A10.22 electrophorus, etc Four demos: one illustrating the action of an electrophorus., another showing the reaction of a charged balloon to a paddle charged positive, negative, or neutral, and more.
		5B10.52 finger on the electrophorus Charge and electrophorus., then trace a circle on it with your finger and probe the resulting field with a pith ball on a long thread.
	www.wfu.edu /physics/pira/ResourceCD/DCS/EandMDCS.htm (16830 words)

	Frying Pan Electrophorus
		Volta did combine cells to form a "voltaic pile," an early electric battery, and it is possible he attained a voltage high enough to register on an electroscope.
		You will also need some light electrical wire (strands pulled out from a telephone cable will do), a 1.5 volt dry cell and a neon-lamp circuit tester, the kind used to check home wiring, to see whether a conductor is "hot" or not.
		An electrophorus is essentially a parallel plate capacitor, in which one plate can be lifted off.
	www.phy6.org /outreach/edu/electrph.htm (1159 words)

	[No title] (Site not responding. Last check: 2007-10-24)
		(1745-1827), professor of Physics at Padua, announced the discovery of a perpetual electrophorus (that which carries off electricity).
		It consisted of an insulator on a thin plate of metal which was rubbed with cat's fur or fox tail.
		This was Volta's contribution to static electricity go to 1800 on the timeline for Volta's contribution to direct current electricity.
	itp.nyu.edu /~nql3186/electricity/pages/volta1.html (111 words)

	NationMaster - Encyclopedia: MythBusters Episodes
		Binomial name Electrophorus electricus Linnaeus, 1766 The electric eel (Electrophorus electricus) is a most unusual species of fish.
		Binomial name Electrophorus electricus The electric eel (Electrophorus electricus) is a most unusual species of fish.
		Genera Eptatretus Myxine Nemamyxine Neomyxine Notomyxine A hagfish is any of several marine chordates of the class Myxini, also known as Hyperotreti.
	www.nationmaster.com /encyclopedia/MythBusters-Episodes (11910 words)

	The Electrophorus: an electrostatics demonstration with electroscope and corona point discharge accessories from the ...
		The Electrophorus: an electrostatics demonstration with electroscope and corona point discharge accessories from the University of Rochester
		simple electrophorus made of aluminum pie plates and other inexpensive materials.
		In addition, the library references below contain interesting information about the electrophorus and other electrostatics demonstrations.
	www.ece.rochester.edu /~jones/demos/electrophorus.html (1004 words)

	Exploratorium: Science Snacks: Charge and Carry
		Then you use the charged Styrofoam to charge an aluminum pie pan.
		The entire apparatus for charging the aluminum plate is called an electrophorus, which is Greek for charge carrier.
		An even larger charge can be stored up in a device called a Leyden jar, made from a plastic film can.
	www.exploratorium.edu /snacks/charge_carry.html (1104 words)

	Electrophorus (Site not responding. Last check: 2007-10-24)
		The electrophorus was invented by the 18th century American scientist and political activist, Benjamin Franklin.
		The original source of charge for the electrophorus is the charged Styrofoam plate.
		Write a complete description of how the electrophorus works.
	physicsed.buffalostate.edu /SeatExpts/EandM/elephor (422 words)

	[No title]
		A SIMPLE ELECTROSTATIC GENERATOR Bill Beaty The Electrophorus Cut out a disk of cardboard about 8" to 12" in diameter.
		Cover one side with aluminum foil, and fold the foil up over the other side so it partially covers it.
		But don't use anti-static fabric softener!) To operate the electrophorus, place your plastic object on a table and rub its surface with fur or wool to charge it well.
	www.amasci.com /emotor/electoph.txt (223 words)

	eelman records© wellington new zealand - eel facts and other eel info
		They are members of a group of electrical fish that includes the knife fish and the ghost fish, both of which can also be seen at the Record Aquarium.
		The electric eel (Electrophorus electricus), which is found in South American tropical regions, has the ability to produce powerful electric charges.
		The low intensity charges emitted by the eel range from 5 to 10 V. The higher intensity charges vary by the size of the eel.
	www.eelmanrecords.com /eel_facts.html (595 words)

	Electrophorus - ENCYCLOPEDIA - The History Channel UK
		Electrophorus - ENCYCLOPEDIA - The History Channel UK or LOGIN
		Our search facility includes over 50,000 fully cross-referenced historical entries.
		THE HISTORY CHANNEL and BIOGRAPHY are trademarks of AandE Television Networks used under license ©2004 AandE Television Networks.
	www.thehistorychannel.co.uk /site/search/search.php?word=electrph-us (208 words)

	The Physics Classroom
		Charging an Electrophorous by Induction using an Balloon
		Charging an Electrophorus by Induction Using a Negatively-Charged Object
		A common physics demonstration involves the charging of an aluminum pie plate by the process of induction.
	www.physicsclassroom.com /mmedia/estatics/epn.html (393 words)

	Solution: Electrophorus (Site not responding. Last check: 2007-10-24)
		The original source of charge for the electrophorus is the charged Styrofoam
		You do work moving the charges on the pan through the electric field produced by the negative charges on the plate.
		Arizona gas pumps have a sticker on them as shown.
	physicsed.buffalostate.edu /SeatExpts/EandM/elephor/solution.htm (581 words)

	MavicaNET - Electrophorus (Site not responding. Last check: 2007-10-24)
		Каталог / Природа / Життя / Тварини / Риби (Pisces) / Ray-finned fishes (Actinopterygii) / Knifefishes (Gymnotiformes) / Electric knifefishes (Electrophoridae) / Electrophorus
		Species Summary for Electrophorus electricus - Electric eel
		Prefers muddy bottms and calm waters; frequently found in coastal plains, swamps and creeks but is also found inland where a favorable biotope exist.
	www.mavicanet.com /lite/ukr/26121.html (152 words)

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