8-sinf Fizika 2-chorak May 5, 2021May 5, 2021 da chop etilgan InfoMaster tomonidan 8-sinf Fizika 2-chorak ga fikr bildirilmagan. 9 8-sinf Fizika 2-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 25 Elektr zanjirida 2 m va ko’ndalang kesimining yuzi 0,5 mm2 bo’lgan nixrom simning qarshiligini toping ? A) 4,4 Ω B) 440 Ω C) 220 Ω D) 2,2 Ω 2 / 25 Tok kuchining o'lchov birligi nima? A) Volt B) Kulon C) Amper D) Joul 3 / 25 Tok kuchi formulasi keltirilgan javobni aniqlang? A) I=q/t B) Q=ItU C) R=U/I D) U=A/q 4 / 25 Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ? A) 0.4 A B) 0,1 A C) 0,2 A D) 0,5 A 5 / 25 Elektr zanjirda tokni rostlash uchun qo’llaniladigan turli qarshilikli elektr asbobi qanday nomlanadi ? A) potensiyometr B) elektrometr C) elektroskop D) rezistor 6 / 25 Tok kuchini o’lchaydigan asbob qanday nomlanadi ? A) Elektrometr B) Elektroskop C) Ampermetr D) Voltmetr 7 / 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) 44.4 Ω C) 44 Ω D) 20 Ω 8 / 25 Elekt kuchlanishi formulasi berilgan javobni ko’rsating. A) U=A|q B) E=U/d C) I=q/t D) F=kq/r^2 9 / 25 Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi? A) Elektrlanmaydi B) Musbat C) to'g'ri javob yo'q D) Manfiy 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) 0.5 Ω C) 0.4 Ω D) 1 Ω 11 / 25 Bitta elektron zaryadi nechaga teng ? A) 9,1*10^-31C B) 2,01*10^-19C C) 1,6*10^-19C D) 8,81*10^-19 12 / 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) 270 N B) 5*10‾⁸ N C) 2*10‾⁸ N D) 5,4*10‾⁴ N 13 / 25 Elektrlanishning necha turi mavjud ? A) 4 B) 3 C) 2 D) 5 14 / 25 Qarshiliklari 200 Ω va 300 Ω bo`lgan ikkita elektr lampa parallel ulanib, 240 V tarmoqqa kiritilgan. Umumiy tok kattaligini toping. A) 1.8 A B) 4 A C) 2 A D) 5 A 15 / 25 Elektr zaryadining o’lchov birligi nima ? A) Joul B) volt C) Amper D) kulon 16 / 25 Atom yadrosida ikkita proton va ikkita neytron bor. Undagi elektronlar soni nechta? A) 6 ta B) 0 ta C) 4 ta D) 2 ta 17 / 25 Bitta elektron massasi nechaga teng ? A) 8,81*10^-19kg B) 3,36*10^-32kg C) 1,6*10^-19kg D) 9,1*10^-31kg 18 / 25 Qahrabo so’zining ma’nosi nima ? A) Manfiy B) Elektrlanuvchi C) Somon tortuvchi D) Qattiq rezina 19 / 25 Atom so’zining ma’nosi nima ? A) Elektr zaryat B) Zaryad C) Bo’linmas D) Musbat zaryad 20 / 25 Jismlarning elektrlanganligini sezish ,kuzatish uchun qo’llaniladigan asbob qanday nomlanadi ? A) Barametr B) Elektroskop C) Areometr D) spedometr 21 / 25 O’lchami va shakli hisobga olinmaydigan zaryadlangan jism qanday nomlanadi ? A) Musbat zaryad B) Manfiy zaryad C) Elementar zaryad D) Nuqtaviy zaryad 22 / 25 Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan? A) yunon olimi Aristotel B) yunon olimi Fales Miletskiy C) grek olimi Arximed D) hamma javoblar to'g'ri 23 / 25 bu shartli belgi qanday nomlanadi? A) Kalit B) O’tkazgichlarning tutashtirmasdan kesishishi C) Qo’ng’iroq D) Tok manbayi 24 / 25 Ikkita o`tkazgichlar avval ketma- ket, so`ngra parallel ulandi. Bunda uning umumiy qarsiligi qanday o`zgaradi? A) o`zgarmaydi B) 4 marta kamaydi C) 2 marta kamayadi D) 2 marta ortadi 25 / 25 Elektr doimiysining son qiymati nechaga teng? A) 9,1*10^-31kg B) -3*10^-19 C C) 3*10^-19 C D) 8,85*10^-12C^2/N*m^2 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