электр токи

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мм_8 ўзгармас электр токи dr. jamoliddin razzokov jrazzokov@gmail.com fizika va kimyo kafedrasi маъруза режаси электр токи. ток кучи. ўзгармас ток. ток кучининг зичлиги. ток манбалари. электр юритувчи куч 2 electric current a flow of charge is called an electric current 3 electric current a flow of charge is called an electric current the current (symbol i) is the amount of charge q [in coulombs] flowing per unit time t [in seconds] the units of current are c/s or “amperes” a 5 http://hyperphysics.phy-astr.gsu.edu/hbase/electric/imgele/micohm.gif what occurs in a wire when the circuit switch is closed? electric current, resistance, and semiconductors although electrons move fairly freely in metal wires, something has to push on them to get them going and keep them going. it's like water in a garden hose; the water flows only when a force pushes on it. similarly, electrons flow in a circuit only when an electrical force pushes on …

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entional current” (positive) or “electron current” (negative) 10 resistance depends on type of material, size and shape, temperature. r=ρ l a l: length of the wire a: cross-sectional area ρ: resistivity (inherent to material) electric current electrical power may be supplied as either a direct current or an alternating current we will only cover direct current in this topic 22 ohm’s law : electrical shock current of “only” 100 ma can be fatal to humans luckily, resistance between points on human skin so, fatal voltage = v = i r = 0.1 x 105 = 10,000 v if skin is wet, resistance is reduced. be careful! 23 electric power power is measured in watts (1 w = 1 j/s) your “power bill” is probably measured in “kwh” or “kilo-watt hours” this is really an “energy bill” … 1 kwh = 1000 j/s x 3600 s = 3.6 x 106 j …

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$uchun xam, to’k kuchidan tashqari kuchining zichligi deb ataluvchi fizik kattalik tushunchasi kiritiladi va “ j “ xarfi bilan belgilanadi..to’k kuchining zichligi deb , o’tkazgichning bir birlik ko’ndalang kesimi yuzidan o’tgan to’kning kuchiga miqdor jixatdan teng bo’lgan fizik kattalikga aytiladi ,ya’ni : j=i\s. elektr toki biron – bir tashqi kuchlar ta’siri, zaryadlarning tartibli harakati natijasida yuzaga keladi. eletr tokini zarur bo’lgan omillaridan biri zaryadni mavjud bo’lishi va ularni harakatga keltiuvchi tashqi kuchlar bo’lishi kerak. tok zichligi vektor, tok kuchi esa skalyar kattalikdir. qiymati vaqt bo`yicha o’zgarmaydigan tok o`zgarmas tok deyiladi. agar o`tkazgich orqali tok o`tayotgan bo`lsa, o`tkazgichning turli joylarida potensial birxil bo`ladi. eyuk deb - zaryadni ko`chirishda tashqi kuchlar bajaradigan ishga teng bo`lgan kattalikka aytiladi. doimiy tokni faqat tashqi kuchlar ta`sirida taminlash mumkin. e = a q f = t q e zanjirda uzluksiz o`zgarmas tok oqib turishi uchun kulon kuchidan tashqari, potensiallar farqini hosil qiluvchi tashqi noelektirik kuchlar mavjud …$

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i to’k manbalari bajaradi.elektr to’k manbalari xilma-xil bo’lib ,ularning barchasida musbar va manfiy zaryadlarni ajratish ishi bajariladi . ajratilgan zaryadlar to’k manbaining qutblarida to’planadi.qutb deb , manbaning klemma ( qisqichlar ) orqali o’tkazgichlarga ulanadigan joylariga aytiladi . to’k manbaining bir qutbi musvat , ikkinchi qutbi manfiy zaryadlanib , ular orasida ichki elektr maydon xosil bo’ladi .agar to’k manbaining qutblari o’tkazgich bilan ulansa , o’tkazgichda tashqi elektr maydon xosil bo’lib , maydon ta’sirida o’tkazgich bo’ylab erkin elektronlar xarakatlanadi va elektr to’ki vujudga keladi. фойдаланилган адабиётлар glencoe science physics. “principles and problems” 2012 halliday resnick “fundamentals of physics” 2012 абдурахманов к.п., эгамов у. физика курси , 2011 й. огурцов н.а. курс лекций по физике, харьков,2007. колмаков ю.н. курс лекций по физике, тула, 2002. оплачко т.м.,турсунметов к,а. физика, ташкент, 2007 http://phet.colorado.edu/ http://www.falstad.com/mathphysics.html http://www.quantumatomica.co.uk/download.htm http://school-collection.edu.ru 38 таълим сайтлари ва интернет ресурслари yenka.com http://phet.colorado.edu/ http://www.falstad.com/mathphysics.html http://www.quantumatomica.co.uk/download.htm http://school-collection.edu.ru 39 image3.jpeg image4.jpeg image5.jpeg image6.gif image7.png image4.png image5.png …

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мм_8 ўзгармас электр токи dr. jamoliddin razzokov jrazzokov@gmail.com fizika va kimyo kafedrasi маъруза режаси электр токи. ток кучи. ўзгармас ток. ток кучининг зичлиги. ток манбалари. электр юритувчи куч 2 electric current a flow of charge is called an electric current 3 electric current a flow of charge is called an electric current the current (symbol i) is the amount of charge q [in coulombs] flowing per unit time t [in seconds] the units of current are c/s or “amperes” a 5 http://hyperphysics.phy-astr.gsu.edu/hbase/electric/imgele/micohm.gif what occurs in a wire when the circuit switch is closed? electric current, resistance, and semiconductors although electrons move fairly freely in metal wires, something has to push on them to get them going and keep them going. …

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