8-sinf Fizika 2-chorak May 5, 2021May 5, 2021 da chop etilgan InfoMaster tomonidan 8-sinf Fizika 2-chorak ga fikr bildirilmagan. 5 Tomonidan yaratilgan InfoMaster 8-sinf Fizika 2-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 25 Elektr sig’imining o’lchov birligi nima ? A) amper B) Kulon C) Farad D) Sekund 2 / 25 Ikkita o`tkazgichlar avval ketma- ket, so`ngra parallel ulandi. Bunda uning umumiy qarsiligi qanday o`zgaradi? A) 4 marta kamaydi B) 2 marta ortadi C) 2 marta kamayadi D) o`zgarmaydi 3 / 25 Zaryadi -5*10-8 C bo’lgan nuqtaviy zaryadning 3 sm msofada hosil qilgan elektr maydon kuchlanganligini toping? A) 5,1*10⁶ N/C B) 6*10⁴ N/C C) 5*10⁵ N/C D) 5*10‾⁵ N/C 4 / 25 Elektr zanjirida ketma-ket ulangan iste`molchilar qarshiliklari 80, 120 va 200 Om dan iborat. Umumiy kuchlanish 220 V bo`lsa, uchinchi iste`molchidagi kuchlanish tushuvini toping A) 110 V B) 220 V C) 44 V D) 180 V 5 / 25 O’lchami va shakli hisobga olinmaydigan zaryadlangan jism qanday nomlanadi ? A) Musbat zaryad B) Nuqtaviy zaryad C) Elementar zaryad D) Manfiy zaryad 6 / 25 bu shartli belgi qanday nomlanadi? A) Qo’ng’iroq B) O’tkazgichlarning tutashtirmasdan kesishishi C) Kalit D) Tok manbayi 7 / 25 Qarshiliklari 200 Ω va 300 Ω bo`lgan ikkita elektr lampa parallel ulanib, 240 V tarmoqqa kiritilgan. Umumiy tok kattaligini toping. A) 5 A B) 2 A C) 4 A D) 1.8 A 8 / 25 Bir-biridan 10sm masofada turgan sharchalardanbirining zaryadi -2*10-8 C, ikkinchisiniki esa 3*10-8C ga teng. Ular qanday kuch bilan tortishadi? A) 2*10‾⁸ N B) 5,4*10‾⁴ N C) 5*10‾⁸ N D) 270 N 9 / 25 Bitta elektron zaryadi nechaga teng ? A) 2,01*10^-19C B) 9,1*10^-31C C) 8,81*10^-19 D) 1,6*10^-19C 10 / 25 Qarshiligi 10 Ω bo`lgan mis o`tkazgichni 5 ta teng bo`lakka bo`lib, bo`laklar o`zaro parallel ulandi. Umumiy qarshilikni toping. A) 0.2 Ω B) 1 Ω C) 0.5 Ω D) 0.4 Ω 11 / 25 Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan? A) grek olimi Arximed B) hamma javoblar to'g'ri C) yunon olimi Fales Miletskiy D) yunon olimi Aristotel 12 / 25 Atom so’zining ma’nosi nima ? A) Musbat zaryad B) Elektr zaryat C) Bo’linmas D) Zaryad 13 / 25 Atom yadrosida ikkita proton va ikkita neytron bor. Undagi elektronlar soni nechta? A) 2 ta B) 6 ta C) 4 ta D) 0 ta 14 / 25 Elektrlanishning necha turi mavjud ? A) 3 B) 2 C) 5 D) 4 15 / 25 Zaryadli zarralarning tartibli harakati,ya’ni oqiminima deb nomlanadi? A) Musbat zaryad B) Elektr toki C) Zaryad D) Tok kuchi 16 / 25 Elektr qarshiligi qaysi harf bilan belgilanadi? A) R B) U C) J D) L 17 / 25 Kuchlanishni o’lchaydigan asbob nima diyeladi? A) elektroskop B) elektrometr C) voltmeter D) ampermetr 18 / 25 Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ? A) 0,1 A B) 0.4 A C) 0,2 A D) 0,5 A 19 / 25 Rezistor so’zining manosi nima ? A) Kuchlanish B) Zaryad C) Qarshilik D) Tok kuchi 20 / 25 Rezistor uchlaridagi kuchlanish 9 V ga teng . Unda 0,5 A tok utishi uchun uning qarshiligi qancha bo’lishi kerak ? A) 18 Ω B) 20 Ω C) 44 Ω D) 44.4 Ω 21 / 25 Elektr zanjirlaridagi Lampochkadan 0,2 A tok o’moqda lampochka speraliorqali 1 minutda nechakulon zaryad o’tadi ? A) 12 C B) 15 C C) 10 C D) 24 C 22 / 25 Elektr zanjirda tokni rostlash uchun qo’llaniladigan turli qarshilikli elektr asbobi qanday nomlanadi ? A) elektroskop B) elektrometr C) potensiyometr D) rezistor 23 / 25 Tok kuchini o’lchaydigan asbob qanday nomlanadi ? A) Voltmetr B) Ampermetr C) Elektroskop D) Elektrometr 24 / 25 Uzunligi 1 m, ko’ndalang kesimining yuzi 0,4 mm2 bo’lgan nikelin simning uchlaridagi kuchlanish 2 V gat eng. Shu elektr zanjir orqali o’tayotgan tok kuchini aniqlang? A) 9 A B) 0,8 A C) 2 A D) 4 A 25 / 25 Elekt kuchlanishining ulchov birligi nima? A) Kulon B) Sekund C) Amper D) Volt 0% Testni qayta ishga tushiring Baholash mezoni 86%-100% 5 baho 71%-85% 4 baho 56%-70% 3 baho 55% va kamiga 2 baho Fikr-mulohaza yuboring Author: InfoMaster Fizika choraklik