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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 * Assessment: Fundamentals Passive Components * Introduction: Passive Components * Resistors * Capacitors * Inductors ## Inductor Specifications ## Preferred Values: Inductors ## Inductor Markings ## Examples: Inductor Markings ## Inductor Symbols ## Inductor Construction ## Inductors in Series ## Inductors in Parallel ## Examples: Inductors in Circuits ## Variable 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 Variable Inductors<^< Examples: Inductors in Circuits | Course Index | Transformers >^>(:nl:)  By moving the magnetic core of an inductor in and out of the inductor windings, an inductor can be made variable. A ferrite cored inductor can be made variable by moving its core in or out of the former onto which the coil is wound. Many small inductors have threaded ferrite cores to make this possible. Such inductors are often used in radio and high-frequency applications where precise tuning is required. Typical values for variable inductors tend to range from about 10μH to 100μH. Finally, you may also encounter various forms of preset inductor that are used to make occasional adjustments (e.g. for precisely adjusting the frequency of an oscillator). Typical values for preset inductors tend to range from about 10nH to 100mH. (:nl:)(:table style="clear:both":)
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Page last modified on July 21, 2011, at 08:18 AM