Reactance, in electricity, measure of the opposition that a circuit or a part of a circuit presents to electric current insofar as the current is varying or alternating. Inductive reactance definition of inductive reactance by. This charge differential, by definition, is voltage see part 1 of this series. To specify a specific type of reactance, a subscript is used. Electrical reactance, the opposition to a change in voltage due to. To know more about the electric contractor and other matter in electricity click here. Inductive reactance definition, the opposition of inductance to alternating current, equal to the product of the angular frequency of the current times the selfinductance. Given the power factor and values of x and r in an ac circuit, compute the value of reactance in the circuit, and state the type of reactance that must be connected in the circuit to correct the power factor to unity 1. Reactances definition of reactances by the free dictionary.
Reactance tube definition of reactance tube by merriam. According to the theory when an individual feels forced into a certain behavior, they will react against the coercion. Reactance tube definition is an electron tube that by a variation of its operating voltage can give the effect of a variation of reactance across its electrodes or across a network connected to its electrodes. Mechanical reactance article about mechanical reactance. As the frequency increases for a given value of inductance, the inductive reactance increases in imaginary terms. Another choice is to define capacitive reactance as a positive number. In this case, since its capacitive reactance, the subscript c is used. What is impedance, difference between impedance and resistance. This is the difference between resistance and reactance.
Jun 07, 2017 while the resistance is independent of the frequency of ac, reactance changes with the frequency of ac. Resonant frequency is the frequency where the inertance and capacitance are equal in magnitude and opposite in sign phase, and are measured in hz. The imaginary part of mechanical impedance explanation of mechanical reactance. Reactance reactance is the resistance produced to ac currents by inductors and capacitors only. Larger reactance leads to smaller currents for the same voltage applied.
In accordance with reactance theory brehm, 1966, this view is supported as the organization is creating and continuing the controlled work situation through higher levels of centralization and formalization, as well as limiting employees autonomy and freedom and causing a negative reactance. In electrical and electronic systems, reactance is the opposition of a circuit element to a change of electric current or voltage, due to that elements inductance or capacitance. Consumer reactance refers to an individual final negative response towards opa. The theory is relevant to the idea that humans are motivated to possess and preserve as many options and choices as possible. Reactance definition of reactance by medical dictionary. Reactance definition is the part of the impedance of an alternatingcurrent circuit that is due to capacitance or inductance or both and that is expressed in ohms. Ac voltage applied to an capacitor formula, definition. A theory of freedom and control provides information pertinent to the fundamental aspects of reactance theory. To help you on the right track why not download our maths tips booklet, which shows. Symbol x electricity opposition to the flow of alternating current caused by the inductance and capacitance in a circuit rather than by resistance. Inductive reactance definition of inductive reactance at. Mechanical reactance article about mechanical reactance by.
Like resistance, reactance it is measured in ohms, but is separate from the opposition to current caused by any internal. Information and translations of reactance in the most comprehensive dictionary definitions resource on the web. Capacitive reactance is assigned negative imaginarynumber values. Encyclopedia article about mechanical reactance by the free dictionary. Reactance also makes a phase difference between the current phase and voltage phase. The formula for inductive reactance mult iplies the angular velocity of the ac wave by the value of inductance. In electric and electronic systems, reactance is the opposition of a circuit element to the flow of current due to that elements inductance or capacitance.
Perunit reactance changes inversely voltage down, reactance up with the square of the voltage ratio if the kva rating stays the same. Reactance is very similar to resistance but not exactly the same. Most of us are familiar with resistance at least we think we are. Hence, in the context of consumer reactance, users may develop benefit and risk beliefs from a negativeeffect perspective by interpreting them as a perceived concern, risky nodes, or unfavorable expectations liu et al. Electrical reactance for other uses, see reactance disambiguation. When current passes through the coil, an electrical field is generated.
May 11, 2018 impedance also includes reactance inductive and capacitive property of the circuit. Looking for online definition of reactance or what reactance stands for. Steindl et al understanding psychological reactance 211. Difference between resistance and reactance compare the. If at 480 volts, the listed transient reactance is 0. Capacitive reactance an overview sciencedirect topics.
What is reactance reactance is an opposition to a change in current. Capacitive reactance definition capacitive reactance is an opposition to the change of voltage across a capacitance. A capacitor is a device that is able to store electrical energy. This is a measure of the type of opposition to ac electricity due to capacitance or inductance. This is part 2 of a 3part series on resistance, reactance and impedance.
In electric and electronic systems, reactance is the opposition of a circuit element to the flow of. Reactance theory is something that probably happens to everyone, even if we dont know what it is. As the inductance of a component increases, its inductive reactance becomes larger in imaginary terms, assuming the frequency is held constant. Reactance is a property of capacitors or inductors because their functionality is intimatel. Petropedia explains reactance reactance is used for computing phase changes and amplitude of the current going through a circuit element. Also the measured results show that the crosspolarization level lhcp is lower than the copolarization level rhcp by more than 20 db at the broadside direction, which is due to the fact that the probefed horizontal rectangular strip can provide the necessary capacitive reactance to compensate the inductive reactance caused by the vertical probes. Reactance definition, the opposition of inductance and capacitance to alternating current, expressed in ohms. Electrical fundamentals reactance and impedance pdh online. For calculations you can choose which formula to use for inductive reactance, either 2l or. Airway resistance and reactance are affected in systemic. Reactance is similar to electric resistance, but it differs in several respects. Leakage reactance definition of leakage reactance by. But few of us really understand reactance and its relationship to resistance. Understanding transient reactance cashman equipment co.
As defined within selfdetermination theory sdt, ryan and deci 1985, 2000. Sep 24, 2016 i am sure that you know about resistance if not please go through this electrical resistance and conductance. Psychological reactance and persuasive healthcommunication. Leakage reactance definition is the part of the reactance of a circuit that corresponds to the leakage flux. In the simulation, two values of transmission line reactance is considered xt 0. Atestandextension of the intertwined model stephen a. Reactance definition broadly, reactance refers to the idea that people become upset when their freedom is threatened or eliminated, so much so that they attempt to reassert their lost freedom. State the definition of and write the formula for power factor. To help you on the right track why not download our maths tips booklet, which shows you how to use. Resistance, reactance and impedance a primer douglas brooks, phd ultracad design, inc. Part 2, reactance this is part 2 of a 3part series on resistance, reactance and impedance.
The relationship between reactance, frequency and capacitance. This reaction is often exemplified by an increased desire for the behavior that is now. Pdf understanding psychological reactance researchgate. Pdf since brehm first proposed reactance theory in 1966, many studies have explored the remarkable psychological phenomenon of. In an ideal resistor, zero reactance is observed while in an ideal capacitor and inductor, zero resistance is found, which is a response to the current by reactance only. Reactance can occur when someone is heavily pressured to accept a certain view or attitude. The theory describing a motivational state consisting of distress, anxiety and desire to restore freedoms taken away when an individual responds to a perceived threat or to loss of a freedom. We talk in terms of a capacitor being charged up, or building a voltage. The units of reactance, like those of impedance, are ohms. Steady electric currents flowing along conductors in one direction undergo opposition called electrical resistance, but no reactance. This book discusses a number of special topic areas to which the reactance theory seems especially relevant. The theory describing a motivational state consisting of distress, anxiety and desire to restore freedoms taken away when an individual responds to a perce. As these two causes, occurring in the same component, cannot be physically separated, it is often essential to consider the combined effects of both reactance and resistance on the current through the inductor.
Reactance definition of reactance by the free dictionary. What is the difference between resistance and reactance. Reactance, autonomy and paths to persuasion selfdetermination. L, but 2l is more commonly used, one reason being that scientific.
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