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Topic: Secondary coil

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	Induction Coil - LoveToKnow 1911
		Induction coils are employed for physiological purposes and also in connexion with telephones, but their great use at the present time is in connexion with the production of high frequency electric currents, for Röntgen ray work and wireless telegraphy.
		A general description of the mode of constructing a modern induction coil, such as is used for wireless telegraphy or Röntgen ray apparatus, is as follows: The iron core consists of a bundle of soft iron wires inserted in the interior of an ebonite tube.
		The secondary coil consists of No. 36 or No. 32 silk-covered copper wire, and each of the sections is prepared by winding, in a suitable winding machine, a flat coiled wire in such a way that the two ends of the coil are on the outside.
	www.1911encyclopedia.org /Induction_Coil (3695 words)

	Apparatus for charging a propulsion battery of an electrically powered vehicle - Patent 5661391
		The secondary coil opening is preferably rectangularly shaped, with the dimension of the opening as measured along the longitudinal direction of said vehicle being at least 1.5 times the dimension of the central extending portion of the primary core as measured along said longitudinal direction of the vehicle.
		The secondary coil 2 is enclosed by a resin case 20 having a pair of leg portions 22 projecting downward from the bottom of the case and a rectangular center opening 21.
		The secondary alternating current appearing across the secondary coil 2 is rectified by two pairs of transistors T1, T2 and T3, T4 in the bridge rectifying circuit into a direct current for charging the battery B of the vehicle 1 connected to the secondary coil 2.
	www.freepatentsonline.com /5661391.html (3502 words)

	Coil Encyclopedia Articles @ HotAndCold.com (Hot and Cold) (Site not responding. Last check: )
		A boiler coil is an element in a water heater.
		A Oudin coil is a disruptive discharge coil.
		The RNA coil is a nucleic acid structure consisting of a string of covalently-bound nucleotides.
	www.hotandcold.com /encyclopedia/Coil (890 words)

	Ignition coil construction for engine ignition system - Patent 4509033
		The primary coil body (10) with its coil, the secondary coil body (11) with its coil and also the high voltage connector body (12) with a connector (13) therein are separate bodies put together by snap connections to provide a pre-assembled unit.
		This pre-assembled unit consists of a primary coil body 10, a secondary coil body 11 having a secondary winding 14, part of which is visible, and a high voltage terminal body 12, in which a connector socket 13 for the secondary coil winding 14 is fixed by having an insulating shell injection molded around it.
		The shape of the secondary coil body 11 is essentially that of a hollow cylinder of which the axis is shown at 16.
	www.freepatentsonline.com /4509033.html (2611 words)

	How Things Work - Question 1498
		Remember that the current flowing in the secondary coil is itself magnetic and because it is an alternating current, it is accompanied by its own electric field.
		The secondary coil's electric field opposes the primary coil's electric field, in accordance with a famous rule of electromagnetism known as Lenz's law.
		The primary coil's electric field was pushing backward on current passing through the primary coil, so the secondary coil's electric field must be pushing forward on that current.
	howthingswork.virginia.edu /page1.php?QNum=1498 (456 words)

	Low Voltage Transformers
		The second coil, called the secondary coil is energized by the magnetic force created by the primary coil.
		Depending on the number of turns of the secondary coil relative to the primary coil, the voltage will be reduced at the output terminals of the secondary coil.
		This is accomplished by having leads coming off the primary or secondary coil at various points near the end of the coil to produce several different voltages.
	www.outdoor-lighting-info.com /low-voltage-transformers.html (1127 words)

	Historical Scientific Instrument Gallery (Site not responding. Last check: )
		An emf (or voltage) is induced in a coil by changing the magnetic field in the coil.
		There is an interrupter in the circuit of the primary coil to produce the rapidly changing magnetic field and the high voltage in the secondary coil.
		Induction coils were first used for medical purposes but nowadays they provide the high potentials needed to operate spark plugs in automobiles and gaseous discharge tubes such as neon tubes for signs.
	www.physics.unl.edu /outreach/histinstr/induction.html (498 words)

	PowerLabs Twin Tesla Coil!
		Both coils wound and varnished, with their copper ground straps on place (not really visible due to poor lighting on the picture) and their space-wound top inch, which will be used for further distancing the toroid from the strike rail.
		For the final version of the twin coil a synchronous rotary spark gap is being assembled, which will allow the tank capacitance to be increased and will provide the maximum possible efficiency.
		When I first ran this coil I had my computer and stereo system both on and they were unaffected except for some crackling sounds on the computer's speakers (but not on the stereo) as the main gap fired.
	www.powerlabs.org /coil2.htm (2823 words)

	Ginsberg Scientific - ELECTRICITY
		The outer coil is 4-1/2" tall and 2-3/4" in diameter.
		The inner coil is 3-3/4" tall and 1-1/4" in diameter.
		Coils have noninductive windings so the box is applicable for both DC and AC experiments.
	www.ginsbergscientific.com /0cat_results_elec01.asp?cid=98 (3237 words)

	Glencoe Online Science Quiz Chapter
		What is the output voltage from a step-up transformer with 25 turns in the primary coil and 75 turns in the secondary coil if the input voltage was 120 V? a.
		What is the output voltage from a step-down transformer with 200 turns in the primary coil and 100 turns in the secondary coil if the input voltage was 750 V? a.
		How many turns are in the secondary coil of a step-down transformer that reduces a voltage from 900 V to 300 V and has 15 turns in the primary coil?
	www.glencoe.com /qe/science.php?qi=2694 (256 words)

	Tesla Coil
		The 'Tesla Coil' is a device invented by the brilliant scientist Nikola Tesla (born 1856, died1943)
		A common myth is that a Tesla coil's discharge is harmless due to its high frequency and the skin effect.
		The tesla coil is the basis for this questionable research and never ceases to amaze all those who come in contact with its highly visual and audible effect.
	westinghouseeffect.shinwestinghouse.com /teslacoil (684 words)

	transformer
		In many transformers the coils are wound on a core made of a material with high magnetic permeability; this intensifies the magnetic field induced by the current in the primary, increasing the transformer's efficiency.
		Neglecting power losses (which are made small by careful design), the ratio of primary voltage to secondary voltage is the same as the ratio of the number of turns in the primary coil to the number of turns in the secondary coil.
		The primary and secondary currents are in inverse proportion to the number of turns in the coils.
	www.factmonster.com /id/A0849269 (388 words)

	Tesla Coils - Secondary Coil
		The secondary coil is responsible for generating the very high voltages we are after and must be constructed with care, to avoid disappointment.
		Enameled copper is used for the secondary coil, the same stuff as is used in motors and transformers.
		To seal the PVC coil form, give it 1 to 3 coats; one coat may be all that's needed but I like a little in reserve when I'm sanding down lumps and bumps, prior to winding.
	deepfriedneon.com /tesla_secondary.html (933 words)

	Replica Spark Gap Transmitter,
		The secondary of the coil is connected to the capacitor, spark gap, and the primary winding of the oscillation transformer as shown in figure 1.
		Energy is transferred from the "closed" circuit formed by the tank to the secondary of the O.T. The secondary of the OT, together with the distributed capacitance and inductance of the antenna or load, forms the "open" circuit.
		In the center of the primary coil a central rod, 20" in length and 3/4" in diameter, was attached to the baseboard.
	www.qsl.net /ab0cw/sparktx.htm (2003 words)

	Tesla Secondary Coil
		The pans are attached to the top of the coil with the two ends of a pvc flange union.
		The coil is connected to the toroid with a tapering strip of sheet copper.
		The end of the winding gradually separates and connects to the copper strip in a smooth helical line so that no sharp bends are formed where an unwanted discharge might occur.
	home.austin.rr.com /teslafun/Secondary_coil.htm (545 words)

	PASCO Physics Experiments - May 2005
		In this experiment, students determine the relationship between the voltage, current, and power of the primary and secondary coils of a transformer.
		Relate the values of the voltages from the Secondary Coil to the values of the voltages from the Primary Coil.
		Current graph, the resistance of the Secondary Coil and the resistance that corresponds to the peak power from the Secondary Power graph.
	www.pasco.com /experiments/physics/may_2005/home.html (437 words)

	electric transformers defined - detailed product information center
		In many types, the coils are wound on a core made of a material with high magnetic permeability; this intensifies the magnetic field induced by the current in the primary, increasing efficiency.
		Neglecting power losses (which are made small by careful design), the ratio of primary voltage to secondary voltage is the same as the ratio of the number of turns in the primary coil to the number of turns in the secondary coil.
		The primary and secondary impedances are in the same ratio as the squares of the numbers of turns in the primary and secondary coils.
	www.electricityforum.com /electrical-transformers (718 words)

	Bizarre induction Coil
		The vibrator is a flat, steel spring mounted at one end of the core of the coil in such a position that when the core is magnetized by a current flowing through the primary coil, one end of the vibrator is attracted to the core.
		We are now ready to start the two secondary coils which are exactly alike and must be wound in the same direction.
		By connecting the beginning terminals of the secondaries together next to the primary, the high voltage terminals will be more widely separated from each other and from the primary, thereby lessening the danger of insulation breakdown.
	bizarrelabs.com /ind1.htm (4077 words)

	secondary, secondaries- WordWeb dictionary definition
		Coil such that current is induced in it by passing a current through the primary coil
		Being of second rank or importance or value; not direct or immediate
		"the stone will be hauled to a secondary crusher"; "a secondary source"; "a secondary issue"; "secondary streams"
	www.wordwebonline.com /en/SECONDARY (101 words)

	secondary coil - OneLook Dictionary Search
		We found 6 dictionaries with English definitions that include the word secondary coil:
		Tip: Click on the first link on a line below to go directly to a page where "secondary coil" is defined.
		noun: coil such that current is induced in it by passing a current through the primary coil
	www.onelook.com /?w=secondary+coil&ls=a (113 words)

	A 1.5 Million-Volt Tesla Coil
		In defiance of countless FCC regulations, zoning ordinances, and common sense in general, I constructed this unusually-large Tesla coil in October 1988 for the Britannia Manor Halloween extravaganza in Austin, Texas.
		The Tesla coil's secondary was wound on a specially-constructed lathe with assistance from several Britannia Manor volunteers.
		The secondary coil was constructed in accordance with the specifications in Information Unlimited's BTC-5 plans, which called for 700 turns of high-grade #22 polythermalized magnet wire to be wound on a 20" (51 cm)-diameter cardboard form at a spacing of 10 turns per inch.
	www.qsl.net /ke5fx/tesla.html (681 words)

	Diagnostic Codes
		P0415 Secondary Air Injection System Switching Valve B Circuit
		P0417 Secondary Air Injection System Switching Valve B Circuit Shorted
		P0419 Secondary Air Injection System Relay B Circuit
	www.wanderingtrail.com /Rubi_2003_Trail/Mechanical/Diagnostic_Adjust_Repair/diagnostic_codes.htm (2784 words)

	Learn more about Making a transformer in the online encyclopedia. (Site not responding. Last check: )
		Be careful, the primary coil will now be a powerful electromagnet.
		Repeat with 15 turns on the secondary coil.
		Other experiments using professionally wound coils and oscilloscopes are more suitable for more advanced or older students.
	www.onlineencyclopedia.org /m/ma/making_a_transformer.html (458 words)

	Vertical Transformer
		Put the small coil (secondary) around the core on top of the primary to light the lamp.
		The vertical transformer is used with two coils, one with many turns powers a 110 V lamp, and the other with fewer turns powers a flashlight lamp.
		A vertical transformer is shown with a lot of accessories.
	demoroom.physics.ncsu.edu /html/demos/333.html (120 words)

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