8-sinf Fizika 3-chorak May 5, 2021May 5, 2021 da chop etilgan InfoMaster tomonidan 8-sinf Fizika 3-chorak ga fikr bildirilmagan. 120 8-sinf Fizika 3-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 25 Elektr zaryadlarini to’plash uchun mo’ljallangan asbob qanday nomlanadi? A) Areometr B) Ampermetr C) kondensator D) Voltmetr 2 / 25 Atom yadrosida ikkita proton va ikkita neytron bor. Undagi elektronlar soni nechta? A) 0 ta B) 4 ta C) 2 ta D) 6 ta 3 / 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 4 / 25 Bitta elektron massasi nechaga teng ? A) 3,36*10^-32kg B) 9,1*10^-31kg C) 1,6*10^-19kg D) 8,81*10^-19kg 5 / 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) 180 V C) 44 V D) 110 V 6 / 25 Qahrabo so’zining ma’nosi nima ? A) Elektrlanuvchi B) Qattiq rezina C) Manfiy D) Somon tortuvchi 7 / 25 Bitta elektron zaryadi nechaga teng ? A) 1,6*10^-19C B) 2,01*10^-19C C) 9,1*10^-31C D) 8,81*10^-19 8 / 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) 1.8 A C) 2 A D) 4 A 9 / 25 Atom so’zining ma’nosi nima ? A) Bo’linmas B) Elektr zaryat C) Musbat zaryad D) Zaryad 10 / 25 Elektr janjiridagi lampochkadan ma’lum vaqt davomida 25 c zaryad o’tib , 75 J ish bajarildi,lampochka qanday elektr kuchlanish ostida yongan? A) 25 V B) 12 V C) 15 V D) 3 v 11 / 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) 4 A D) 2 A 12 / 25 Temir moddasining (200C da) solishtirma qashiligi nechaga teng? A) 0.017 B) 0,098 C) 0,4 D) 0.5 13 / 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 14 / 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) 24 C D) 10 C 15 / 25 Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng? A) 1,5 V B) 5V C) 220 V D) 500 kV 16 / 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) 18 Ω C) 20 Ω D) 44 Ω 17 / 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 18 / 25 Elektr qashiligi formulasi qaysi javobda keltirilgan? A) R=U/I B) I=qt C) Q=I^2Rt D) R=ρl/S 19 / 25 Elektr qarshiligi qaysi harf bilan belgilanadi? A) R B) U C) L D) J 20 / 25 Natriy (Na) atomida nechta electron bor ? A) 9 ta B) 11 ta C) 10 ta D) 12 ta 21 / 25 Elektrolizdan foydalanib ,buyumlarning sirtini qiyin oksidlanadigan metallar bilan qoplash….deyiladi ? A) eletrlolez B) Galvonastegiya C) Galvonaplastina D) Ion bog’lanish 22 / 25 Elektr tokining quvvati formulasini ko’rsating ? A) R=I/U B) N=A/t C) P=IU D) I=q/t 23 / 25 220 V kuchlanishda 0,25 A tok olib yonayotgan elektr lampochkadagi tokning quvvatini toping ? A) 550 W B) 5,5 W C) 500 W D) 55 W 24 / 25 Elektrolidan tok o’tayotganda elektrodlarda modda ajralib chiqish hodisasi……deb ataladi A) Eletroliz B) Ion bog’lanish C) Turli eritma D) Suvli eritma 25 / 25 Bug’ mashinasini kim kashf etgan ? A) Jems Uatt B) Volta C) Kulon D) Amper 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