variable resistor - Hutchinson encyclopedia article about variable resistor Printer Friendly
Dictionary, Encyclopedia and Thesaurus - The Free Dictionary
3,581,082,244 visitors served.
forum Join the Word of the Day Mailing List For webmasters
?
Dictionary/
thesaurus
Medical
dictionary
Legal
dictionary
Financial
dictionary
Acronyms
 
Idioms
Encyclopedia
Wikipedia
encyclopedia
?

potentiometer
(redirected from variable resistor)

    Also found in: Dictionary/thesaurus, Medical, Acronyms, Encyclopedia, Wikipedia 0.01 sec.

potentiometer

Electrical resistor that can be divided so as to compare, measure, or control voltages. In radio circuits, any rotary variable resistance (such as volume control) is referred to as a potentiometer.

A simple type of potentiometer consists of a length of uniform resistance wire (about 1 m/3 ft long) carrying a constant current provided by a battery connected across the ends of the wire. The source of potential difference (voltage) to be measured is connected (to oppose the cell) between one end of the wire, through a galvanometer (instrument for measuring small currents), to a contact free to slide along the wire. The sliding contact is moved until the galvanometer shows no deflection. The ratio of the length of potentiometer wire in the galvanometer circuit to the total length of wire is then equal to the ratio of the unknown potential difference to that of the battery.
How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content.
?Page tools
Printer friendly
Cite / link 		Feedback
?Sign in SSL protected
Email:
Password:
Register

Mentioned in?  References in periodicals archive?   Hutchinson browser?   Full browser?
 
Nanococomposites are attractive for resistor applications because variable resistor materials can be formed simply by changing the metal insulator ratio.
Printable nanocomposites: advanced materials provide a low cost and ... by Das, Rabindra N.; Lin, How; Lauffer, John M.; Rowlands, Michael; Card, Norman; Markovich, Voya R. / Printed Circuit Design & Fab
Variable resistor changing resistance value by pressing U.
Patent news by Samples, Bob / Rubber World
We selected a capacitor (C1 on the chart) and a variable resistor (R1 on the chart) to give delay times of 1 second down to 10 micro-seconds.
Synchronizing cameras for 3-D action photography by Leonard, Ronald Jay; Leonard, Robert James / PSA Journal
 
 
 
Hutchinson Encyclopedia
?

Terms of Use | Privacy policy | Feedback | Copyright © 2012 Farlex, Inc.
Disclaimer
All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional.