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Electronic circuits and components * Course Index * Introduction * About the Author * About this Course * Feedback * Course Navigation * How to use this Course * TINA * Locktronics Fundamentals * Introduction: Fundamentals * Units and Multiples * Electricity * Electronic Principles * Electrical Circuits * Alternating Current ## Alternating Voltage and Current ## Waveforms and Signals ## Amplitude and Frequency ## Examples: Amplitude and Frequency ## Measuring Angles ## Radians ## Examples: Radians ## Average Peak and RMS Values ## Reactance ## Capacitive Reactance ## Worksheet: Capacitive Reactance ## Inductive Reactance ## Worksheet: Inductive Reactance ## Impedance ## Worksheet: Impedance * Assessment: Fundamentals Passive Components * Introduction: Passive Components * Resistors * Capacitors * Inductors * Transformers * Batteries, Fuses, Lamps and Switches * Assessment: Passive Components Semiconductors * Introduction: Semiconductors * Diodes * Transistors * Logic Gates * Assessment: Semiconductors Passive Circuits * Introduction: Passive Circuits * Series and Parallel Connections * Kirchoff's Laws * Potential and Current Dividers * Passive Time Variant Circuits * Assessment: Passive Circuits Active Circuits * Introduction: Active Circuits * Power Supply Circuits * Operational Amplifier Circuits * Transistor Amplifier Circuits * 555 Timer Circuits * Assessment: Active Circuits Parts Gallery * Introduction: Parts Gallery * Passive Component Images * Semiconductor Images * Other Images * Quizzes |
(:Summary:Contains the 'action' links (like Browse, Edit, History, etc.), placed at the top of the page, see site page actions:) (:comment This page can be somewhat complex to figure out the first time you see it. Its contents are documented at PmWiki.SitePageActions if you need help. :) * Print (:comment (:if group Site,SiteAdmin,Cookbook,Profiles,PmWiki*:) (:comment delete if and ifend to enable backlinks:) * %item rel=nofollow class=backlinks accesskey='$[ak_backlinks]'% [[{*$Name}?action=search&q=link={*$FullName} | $[Backlinks] ]] (:ifend:) :) * Login Reactance<^< Average Peak and RMS Values | Course Index | Capacitive Reactance >^>(:nl:) When alternating voltages are applied to capacitors or inductors the magnitude of the current flowing will depend upon the value of capacitance or inductance and on the frequency of the voltage. In effect, capacitors and inductors oppose the flow of current in much the same way as a resistor, the important difference being that the effective resistance (or reactance) of the component varies with frequency (unlike the case of a conventional resistor where the magnitude of the resistance does not change with frequency). Reactance, like resistance, is simply the ratio of applied voltage to the current flowing. Thus: X = V/I where X is the reactance in ohms (Ω), V is the alternating potential difference in volts (V) and I is the alternating current in amps (A). In the case of capacitive reactance (i.e. the reactance of a capacitor) we use the suffix, C, so that the reactance equation becomes: X'_C_' = V'_C_'/I'_C_' Similarly, in the case of inductive reactance (i.e. the reactance of an inductor) we use the suffix, L, so that the reactance equation becomes: X'_L_' = V'_L_'/I'_L_' (:nl:)(:table style="clear:both":)
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