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Topic: Inductive reactance

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Capacitor

Resonance

	Reactance - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-10-21)
		In the analysis of an alternating-current electrical circuit (for example a RLC series circuit), reactance is the imaginary part of impedance, and is caused by the presence of inductors or capacitors in the circuit.
		Reactance is denoted by the symbol X and is measured in ohms.
		The more the current changes, the more an inductor resists it: the reactance is proportional with the frequency (hence zero for DC).
	www.encyclopedia-online.info /Reactance (249 words)

	Inductive reactance (Site not responding. Last check: 2007-10-21)
		Etude Biblique Inductive Portail s'adresse aux chrétiennes francophones.
		Inductive Pump Corp. Develops inductive pump technology, awarded two patents due to new technology and uniqueness.
		Non Inductive, High Voltage Resistors from Hill Technical Non inductive, high voltage resistors from the tiny RT type all the way to multi-megajoule custom assemblies; from Hill Technical, company based in Santa Ana, CA, USA.
	www.serebella.com /encyclopedia/article-Inductive_reactance.html (309 words)

	Electrical theory, part 1
		Reactance is represented by the letter “X.” The two types of reactance are inductive reactance and capacitive reactance.
		Inductive reactance is the resistance to current flow in an AC circuit, due to the effects of inductors in the circuit.
		Inductive reactance is much more of a problem at high frequencies than at the 60Hz level.
	ceenews.com /mag/electric_electrical_theory_part/index.html (1234 words)

	Resistance, Reactance, and Impedance
		Like resistance, reactance is expressed in ohms, and it behaves in much the same way as resistance, in the sense that it tends to restrict the flow of current through a circuit.
		X is the general electrical symbol for "reactance", and L is the symbol for "inductance" or "inductor", so put them together and you get the reactance of an inductor.
		XC is, as you might have guessed, the capacitive reactance, and C is the capacitance of the capacitor (in farads).
	www.geocities.com /SiliconValley/2072/elecrri.htm (733 words)

	Reactance (Site not responding. Last check: 2007-10-21)
		For a disscussion of "reactive" or "reactance" in chemistry, see reactivity.'' In the analysis of an alternating-current electrical circuit (for example a RLC series circuit), reactance is the imaginary part of impedance, and is caused by the presence of inductors or capacitors in the circuit.
		is the inductive reactance, measured in ohms f is the frequency, measured in hertz L is the inductance, measured in henry Capacitive reactance (symbol X
		is the capacitive Reactance measured in ohms f is the frequency, measured in hertz C is the capacitance, measured in farad
	reactance.area51.ipupdater.com (320 words)

	POWER AND POWER FACTOR IN AN AC CIRCUIT
		The current due to the leakage reactance is dependant on the total current drawn by the motor, but the magnetising current is independent of the load on the motor.
		As a large proportion of the inductive or lagging current on the supply is due to the magnetising current of induction motors, it is easy to correct each individual motor by connecting the correction capacitors to the motor starters.
		If the motor is critically corrected, (corrected to a power factor of 1.0) the inductive reactance equals the capacitive reactance at the line frequency and therefore the resonant frequency is equal to the line frequency.
	www.geocities.com /vijayakumar777/powerfactor/powerfactor.html (4198 words)

	Impedance
		Since the inductive reactance and capacitive reactance are 90 degrees out of phase with the resistance and, therefore, their maximum values occur at different times, vector addition must be used to calculate impedance.
		The amplitude of the resistance component is shown by a vector along the x-axis and the amplitude of the inductive reactance is shown by a vector along the y-axis.
		The amplitude of the the impedance is shown by a vector that stretches from zero to a point that represents both the resistance value in the x-direction and the inductive reactance in the y-direction.
	www.ndt-ed.org /EducationResources/CommunityCollege/EddyCurrents/Physics/impedance.htm (767 words)

	INDUCTIVE - Definition
		A brutish vice, Inductive mainly to the sin of Eve.
		{Inductive embarrassment} (Physics), the retardation in signaling on an electric wire, produced by lateral induction.
		{Inductive sciences}, those sciences which admit of, and employ, the inductive method, as astronomy, botany, chemistry, etc.
	www.hyperdictionary.com /dictionary/inductive (150 words)

	7.2: Reactance
		Capacitive reactance is symbolized by two parallel lines that represent the parallel plates of a capacitor.
		Inductive reactance is symbolized by a coiled line.
		In order to talk about voltages and currents in a circuit with reactance, it will be necessary to represent their values with more than just numbers--their phase relationship must be shown as well.
	campus.murraystate.edu /tsm/tsm118/Ch7/Ch7_2/ch7_2.htm (448 words)

	reactance -- Britannica Concise Encyclopedia - Your gateway to all Britannica has to offer!
		Reactance is present in addition to resistance when conductors carry alternating current.
		Reactance also occurs for short intervals when direct current is changing as it approaches or departs from steady flow (e.g., when switches are closed or opened).
		Inductive reactance is associated with the varying magnetic field that surrounds a wire or a coil carrying a current.
	concise.britannica.com /ebc/article-9376554?tocId=9376554 (146 words)

	Calculating power factor - Chapter 11: POWER FACTOR - Volume II - AC (Site not responding. Last check: 2007-10-21)
		Inductive reactance can only be canceled by capacitive reactance, so we have to add a capacitor in parallel to our example circuit as the additional load.
		The effect of these two opposing reactances in parallel is to bring the circuit's total impedance equal to its total resistance (to make the impedance phase angle equal, or at least closer, to zero).
		If the load's reactance is inductive in nature (which is almost always will be), parallel capacitance is what is needed to correct poor power factor.
	www.allaboutcircuits.com /vol_2/chpt_11/3.html (892 words)

	reactance - a Whatis.com definition (Site not responding. Last check: 2007-10-21)
		As the inductance of a component increases, its inductive reactance becomes larger in imaginary terms, assuming the frequency is held constant.
		As a real-world example of inductive reactance, consider a coil with an inductance of 10.000 ?H at a frequency of 2.0000 MHz.
		As the capacitance of a component increases, its capacitive reactance becomes smaller negatively (closer to zero) in imaginary terms, assuming the frequency is held constant.
	whatis.techtarget.com /definition/0,,sid9_gci283998,00.html (463 words)

	Inductive Reactance (Site not responding. Last check: 2007-10-21)
		The name given to it is INDUCTIVE REACTANCE because it is the "reaction" of the inductor to the changing value of alternating current.
		Inductive reactance is measured in ohms and its symbol is X
		Reactance, then, increases with an increase of frequency and with an increase of inductance.
	www.tpub.com /neets/book2/4a.htm (267 words)

	Antenna for radio telephone - US Patent 6414638 (Site not responding. Last check: 2007-10-21)
		Here, "arranged on the wall of the case of the radio telephone" is used to mean arranged on the wall of the case such that the rod-shaped antenna is extendable and retractable with respect to the case of the radio telephone through the hollow central portion of the helical antenna.
		Since the resonance frequency of the rod-shaped antenna 10 is dependent upon the capacitive reactance -jX of the electrostatic coupling portion 30, the two resonance frequencies can readily be made to differ slightly by adjusting the gap distance of the electrostatic coupling portion 30 in order to change the size of the capacitive reactance -jX.
		The rod-shaped antenna 110 is established with an electrical length of roughly 3λ/8, and exhibits inductive reactance.
	www.patentstorm.us /patents/6414638.html (5615 words)

	Reactance
		The reactance of a capacitor or inductor is similar to the resistance of a
		You should notice that the reactance increases for inductors as the frequency increases.
		The reactance for the capacitor decreasesas the frequency increases.
	www.angelfire.com /ab6/userper/lcreactance.htm (142 words)

	ARRLWeb: Reactance
		Conventionally, capacitive reactance is called "negative" and inductive reactance is called "positive." Thus a series circuit might have an inductive reactance of "plus" 15 ohms and a capacitive reactance of "minus" 10 ohms; the total reactance would be only 5 ohms (15 - 10) in that case.
		That is, an inductive reactance of 15 ohms placed in series with one of 8 ohms will result in a total of 23 ohms.
		Since the reactance of an inductance goes up when we increase the frequency, while the reactance of a capacitance goes down, it is reasonable to expect that at some frequency the reactances of a given inductance and capacitance will be equal.
	www.arrl.org /tis/info/reactance.html (2821 words)

	impedance - a Whatis.com definition (Site not responding. Last check: 2007-10-21)
		Reactance, denoted X, is an expression of the extent to which an electronic component, circuit, or system stores and releases energy as the current and voltage fluctuate with each AC cycle.
		Reactance is conventionally multiplied by the positive square root of -1, which is the unit imaginary number called the j operator, to express Z as a complex number of the form R + jX
		As an example, a complex impedance consisting of 4 ohms of resistance and +j5 ohms of inductive reactance is denoted as a vector from the origin to the point on the plane corresponding to 4 + j5.
	whatis.techtarget.com /definition/0,,sid9_gci212333,00.html (661 words)

	United States Patent: 6,750,999
		In this embodiment, at least one of the inductive strip and the capacitive strips are controllably reconfigurable by a control circuit of the quasi-optical system to provide the unit cell with a variable overall reactance for producing a variable phase shift in the incident beam.
		As with the reconfigurable inductive strip 106, the metal plating is used to reduce the resistivity of the upper conductive strip 134 caused by the semiconductor strip so as to avoid losses at millimeter and/or sub-millimeter wavelength frequencies of the beam 104 of FIG.
		This increases the length of the reconfigurable inductive strip 106 and therefore the inductive reactance L.sub.v of FIG.
	www.uta.edu /faculty/jcchiao/work/US_Patent_6750999.htm (11687 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		Reactance, denoted X, is a form of opposition that electronic components exhibit to the passage of alternating current (alternating current) because of capacitance or inductance.
		Resistance and reactance combine to form impedance, which is defined in terms of two-dimensional quantities known as complex number.
		Inductive reactance is assigned positive imaginary number values.
	searchwebservices.techtarget.com /termParser/1,290913,sid9_gci283998,00.html (430 words)

	Matching Sections
		The reactance curve is interesting since it clearly shows that the reactance does not vary in a nice sinusoidal curve.
		Nevertheless, for modest values of reactance, we can find a satisfactory length of line at which the reactance is close to zero and the resistance is close enough to 50 ohms to give us a perfectly usable match.
		The higher the reactance, the higher the peak and the smaller portion of the line to which it is confined.
	www.antennex.com /preview/New/quarter.htm (2923 words)

	Self-Inductance and Inductive Reactance
		It should be noted that inductive reactance will increase if the number of winds in the coil is increased since the magnetic field from one coil will have more coils to interact with.
		However, it is possible to distinguish between resistance and inductive reactance in a circuit by looking at the timing between the sine waves of the voltage and current of the alternating current.
		When there is inductive reactance present in the circuit, the phase of the current will be shifted so that its peaks and valleys do not occur at the same time as those of the voltage.
	www.ndt-ed.org /EducationResources/CommunityCollege/EddyCurrents/Physics/selfinductance.htm (910 words)

	LF Bridge
		The bridge is based on the usual HF noise bridge circuit, which is actually a type of capacitance bridge arranged to measure both positive capacitive reactance and the reverse of this which is interpreted as inductive reactance.
		From this, we deduce, that the primary inductance is 450 uH giving a primary reactance of 453 ohms at 160 kHz and adequate for the application (as a rule of thumb, the primary reactance should be at least three times the circuit impedance at the lowest operating frequency).
		As with the noise bridge, there is a calibration where reactance is virtual zero; that is, when the capacitance side approaches infinity and the inductive reactance side approaches zero.
	users.tpg.com.au /users/ldbutler/LFBridge.htm (1879 words)

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