8-sinf Fizika 2-chorak May 5, 2021May 5, 2021 da chop etilgan InfoMaster tomonidan 8-sinf Fizika 2-chorak ga fikr bildirilmagan. 0 8-sinf Fizika 2-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 25 Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng? A) 1,5 V B) 5V C) 500 kV D) 220 V 2 / 25 Rezistor so’zining manosi nima ? A) Tok kuchi B) Kuchlanish C) Zaryad D) Qarshilik 3 / 25 Elektr zanjiridagi lampochkadan 5 minutda 30 C zaryad o’tgani ma’lum. Zanjirdagi ampermetr lampochkadan qancha tok o’tayotganini ko’rsating? A) 0,4 A B) 0,5 A C) 0,1 A D) 6 A 4 / 25 Tok kuchini o’lchaydigan asbob qanday nomlanadi ? A) Elektroskop B) Voltmetr C) Ampermetr D) Elektrometr 5 / 25 Rezistor uchlaridagi kuchlanish 9 V ga teng . Unda 0,5 A tok utishi uchun uning qarshiligi qancha bo’lishi kerak ? A) 44.4 Ω B) 20 Ω C) 18 Ω D) 44 Ω 6 / 25 Elektr janjiridagi lampochkadan ma’lum vaqt davomida 25 c zaryad o’tib , 75 J ish bajarildi,lampochka qanday elektr kuchlanish ostida yongan? A) 12 V B) 15 V C) 3 v D) 25 V 7 / 25 Elekt kuchlanishi formulasi berilgan javobni ko’rsating. A) F=kq/r^2 B) U=A|q C) E=U/d D) I=q/t 8 / 25 Kuchlanishni o’lchaydigan asbob nima diyeladi? A) ampermetr B) elektrometr C) elektroskop D) voltmeter 9 / 25 Elektr qashiligi formulasi qaysi javobda keltirilgan? A) I=qt B) R=ρl/S C) R=U/I D) Q=I^2Rt 10 / 25 Elektr zanjirida 2 m va ko’ndalang kesimining yuzi 0,5 mm2 bo’lgan nixrom simning qarshiligini toping ? A) 2,2 Ω B) 4,4 Ω C) 220 Ω D) 440 Ω 11 / 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) 5*10‾⁸ N B) 2*10‾⁸ N C) 270 N D) 5,4*10‾⁴ N 12 / 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) 5*10⁵ N/C C) 6*10⁴ N/C D) 5*10‾⁵ N/C 13 / 25 Jismlarning elektrlanganligini sezish ,kuzatish uchun qo’llaniladigan asbob qanday nomlanadi ? A) Elektroskop B) spedometr C) Barametr D) Areometr 14 / 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) 220 V B) 44 V C) 110 V D) 180 V 15 / 25 Elektrlanishning necha turi mavjud ? A) 2 B) 5 C) 3 D) 4 16 / 25 Ikkita o`tkazgichlar avval ketma- ket, so`ngra parallel ulandi. Bunda uning umumiy qarsiligi qanday o`zgaradi? A) o`zgarmaydi B) 2 marta ortadi C) 4 marta kamaydi D) 2 marta kamayadi 17 / 25 Elektr zaryadlarini to’plash uchun mo’ljallangan asbob qanday nomlanadi? A) Voltmetr B) Areometr C) kondensator D) Ampermetr 18 / 25 Zaryadli zarralarning tartibli harakati,ya’ni oqiminima deb nomlanadi? A) Tok kuchi B) Elektr toki C) Musbat zaryad D) Zaryad 19 / 25 Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan? A) grek olimi Arximed B) yunon olimi Aristotel C) hamma javoblar to'g'ri D) yunon olimi Fales Miletskiy 20 / 25 Elektr zaryadining o’lchov birligi nima ? A) Amper B) volt C) Joul D) kulon 21 / 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 22 / 25 Atom yadrosida ikkita proton va ikkita neytron bor. Undagi elektronlar soni nechta? A) 6 ta B) 4 ta C) 0 ta D) 2 ta 23 / 25 Bitta elektron zaryadi nechaga teng ? A) 1,6*10^-19C B) 8,81*10^-19 C) 9,1*10^-31C D) 2,01*10^-19C 24 / 25 Bitta elektron massasi nechaga teng ? A) 8,81*10^-19kg B) 1,6*10^-19kg C) 3,36*10^-32kg D) 9,1*10^-31kg 25 / 25 Qarshiliklari 200 Ω va 300 Ω bo`lgan ikkita elektr lampa parallel ulanib, 240 V tarmoqqa kiritilgan. Umumiy tok kattaligini toping. A) 2 A B) 1.8 A C) 4 A D) 5 A 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