Biraha ugu tabinta ee dunida

Biraha Value si toos ah ay go'aamiyeen in ay kiimiko iyo guryaha jireed. In the case oo ah qiyaas noocan oo kale ah, sida conductivity korontada, xiriirka ma aha sidaas sahlan. biraha Most tabinta, haddii tilmaanta qiyaasay heerkulka qolka (+20 ° C), - lacag ah. Laakiin qiimaha sare xaddidaya isticmaalka qaybaha lacag ah ee korontada iyo microelectronics. xubno Silver in qalabka sida dalban oo kaliya in ay dhacdo dantiisa dhaqaale.

Macnaha jirka ah ee conductivity ah

Isticmaalka kirishbooyada macdan leedahay taariikh dheer-taagan. Qubarada iyo injineero ka shaqeeya xarumaha sayniska iyo farsamada, oo isticmaalaya awoodda korontada muddo dheer si loo ogaado qalabka for silig ka dhigeen, boosteejada, xiriirada, loox wareeg daabacan , iyo wixii la mid ah. D. Aqoonso biraha ugu tabinta ee dunida ka caawisaa tirada jirka yeedhay conductivity korontada.

Fikradaha tabinta dib iska caabin korontada. conductivity hadal taranta la xidhiidha unit iska caabin ah, taas oo nidaamka caalamiga ah ee unugyada (SI) waxaa lagu cabiraa ohms. Unit ee conductivity korontada ee SI ah - Siemens. Doorshadan Ruush cutubkan - eeg, heerka caalami - conductivity S. Electric of 1 cm qayb leeyahay shabakadda korontada la iska caabin ah 1 ohms.

conductivity

Waxaa cabiraya awoodda walax si ay u qabtaan hadda korontada yeedhay conductivity. The ugu badan ee tilmaamahan ayaa biraha ugu tabinta. sifo this la go'aamin karaa wax kasta ama dhexdhexaad ah instrumentally iyo leedahay muujinta a tiro. Conductivity kaari cylindrical dhererka unit iyo unit meel cross-qeybaha la xiriira resistivity ee kaari ah.

conductivity unit System waa Siemens halkii mitir - S / m. Si aad u ogaatid oo ka mid ah biraha bir ah ugu tabinta ee adduunka, oo ku filan inay is barbar dhigaan ay conductivity, go'aamiyey experimentally. Mid ka mid ah go'aan ka gaari kara resistivity habka qalab gaar ah - microohmmeter. sifooyinka Kuwanu waa-bedelka.

conductivity biraha

Fikradda aad u of hadda korontada sida socodka faray qayb eedeeyay muuqdaan walxaha more habboonaanta ku salaysan lattices crystal Biraha soo jireenka ah. sidayaal Charge markii koronto in biraha waa electrons xor ah oo udhigo ma aha, sida ay dhacdo in warbaahinta dareeraha ah. Waxaa la experimentally in marka hadda ah ma dhici karto in biraha particulate kala iibsiga walax dhexeeya kirishbooyada dhisay.

walxaha macdan kala duwan yihiin silsilado oo kale oo ka free at heerka qaaradda. qalabka biraha gudaha ah waxa lagu gartaa joogitaanka tiro badan oo electrons "kali". kaas oo, markii loo feydo foomka yar ee ciidamada electromagnetic socodka faray. Sidaa darteed, waa ma Biraha yaab yihiin kirishbooyada wanaagsan ee hadda korontada, iyo in isdhexgalka kelli sida kala duwan birta ugu tabinta. On the muuqaalada dhismeedka daaqaddii crystal ee biraha kale ee ku salaysan guryaha gaarka ah - conductivity kuleyl aad u sareeya.

Hogaanka u kirishbooyada ugu fiican - Biraha

4 biraha isagoo qiimaha wax ku ool ah ay u isticmaalaan sida kirishbooyada korontada loo qaybiyey si soo socda ee magnitude oo la tixgelinayo conductivity ah, qiyaasay in cm / m,

1. Silver - 62.5 million.
2. Copper - 59.5 million.
3. Gold - 45.5 million.
4. Aluminum - 38 million.

Waa la arki karaa in biraha ugu tabinta - lacag ah. Laakiin sida dahabka, waxaa loo adeegsanayaa in la dhiso shabakad korantada oo keliya xaaladaha gaarka ah, gaar ah. Sababta - qiimaha sare.

Laakiin copper iyo aluminium - waa ikhtiyaarka ugu badan ee wax soo saarka korontada iyo cable ay sabab u tahay in ay iska caabin yar yahay in hadda korontada iyo awood. Biraha kale loo isticmaalaa sida kirishbooyada dhif.

ARIMAHA RAADAYNAYA conductivity ee biraha

Xitaa biraha tabinta yaraynaysaa ay conductivity marka ay jiraan daro kale la joogo iyo nijaasta ahaa. In Alloys kale oo aan ahayn qaab-dhismeedka daaqaddii biraha "nadiif ah". Waxaa ka duwan yahay xadgudub ku ah dhabanada, dildilaaca iyo cillado kale. conductivity waa la dhimay iyo heerkulka daarmayaay'e kordhay marka.

iska caabin ah la kordhiyo soo jireenka ah ee Alloys waxaa loo isticmaalaa in xubno ka kululaynta. Waa ma ahan for soo saaridda ee xubno hawlgalka korontada, kulayliyaha nichrome waxaa loo isticmaalaa, fechral iyo Alloys kale.

biraha Most tabinta - lacag qaali dheer loo isticmaalo by jewelers, coinage iwm Si kastaba ha ahaatee, in ay farsamo iyo qalab ay kiimikada gaar ah iyo guryaha jirka waxaa loo ... Tusaale ahaan, ka soo hadhay oo isticmaalaya qanjidhada iyo ahaan la isku celceliyo la hooseeyo daahan iska caabin ah oo lacag ka hortagtaa koox xiriir ka qayilo. The sifooyin u gaar ah oo lacag iyo Alloys ay inta badan isticmaalaan waxa ka mid ah xaq, inkastoo qiimaha sare.