Uy » Choraklik online testlar » Fizika choraklik » 8-sinf Fizika 3-chorak Fizika choraklik 8-sinf Fizika 3-chorak InfoMaster May 5, 2021 1286 Ko'rishlar 1 izoh SaqlashSaqlanganOlib tashlandi 5 9 Tomonidan yaratilgan InfoMaster 8-sinf Fizika 3-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 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) 4 A C) 0,8 A D) 2 A 3 / 25 Elektr janjiridagi lampochkadan ma’lum vaqt davomida 25 c zaryad o’tib , 75 J ish bajarildi,lampochka qanday elektr kuchlanish ostida yongan? A) 3 v B) 25 V C) 15 V D) 12 V 4 / 25 Elektr qarshiligi qaysi harf bilan belgilanadi? A) U B) R C) L D) J 5 / 25 Elektr zanjirda tokni rostlash uchun qo’llaniladigan turli qarshilikli elektr asbobi qanday nomlanadi ? A) elektroskop B) elektrometr C) potensiyometr D) rezistor 6 / 25 Elektr qashiligi formulasi qaysi javobda keltirilgan? A) I=qt B) R=ρl/S C) R=U/I D) Q=I^2Rt 7 / 25 Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan? A) hamma javoblar to'g'ri B) grek olimi Arximed C) yunon olimi Fales Miletskiy D) yunon olimi Aristotel 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) 5*10‾⁸ N B) 270 N C) 5,4*10‾⁴ N D) 2*10‾⁸ N 9 / 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) 180 V B) 220 V C) 110 V D) 44 V 10 / 25 Atom yadrosida ikkita proton va ikkita neytron bor. Undagi elektronlar soni nechta? A) 0 ta B) 2 ta C) 6 ta D) 4 ta 11 / 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) 0.5 Ω B) 0.4 Ω C) 1 Ω D) 0.2 Ω 12 / 25 Atom so’zining ma’nosi nima ? A) Zaryad B) Bo’linmas C) Elektr zaryat D) Musbat zaryad 13 / 25 Elektr sig’imining o’lchov birligi nima ? A) Sekund B) amper C) Farad D) Kulon 14 / 25 Bitta elektron massasi nechaga teng ? A) 9,1*10^-31kg B) 1,6*10^-19kg C) 8,81*10^-19kg D) 3,36*10^-32kg 15 / 25 Atom tuzilishi modulini kim kashf etgan ? A) Beruniy B) Rezerfort C) Demokret D) Kulon 16 / 25 Bitta elektron zaryadi nechaga teng ? A) 8,81*10^-19 B) 2,01*10^-19C C) 9,1*10^-31C D) 1,6*10^-19C 17 / 25 1,5 soat davom etgan elektrolizda katodda 15 mg nikel yig’iladi.Elektroliz vaqtida eletrolitdan o’tagan tok kuchini toping ? A) 7 mA B) 25 mA C) 35,5 mA D) 9mA 18 / 25 Tok o’tayotgan o’tkazgich atrofida magnit maydon bor ekanligini ko’rsatgan tajriba qaysi olim nomi bilanbog’liq ? A) Amper B) Joul C) Ersted D) Volta 19 / 25 Necha volt kuchlanishli elektr tarmoq odam organizmi uchun xavflihisoblanadi? A) 300 Vdan yuqori B) 36 V dan yuqori C) 30 V dan yuqori D) 220 V dan yuqori 20 / 25 Abu Rayhon Beruniy o’z asarlarida magnitni qanday nom bilan atagan ? A) Suniy magnitlar B) Doimiy magnitlar C) Tabiy magnitlar D) Ohangrabo-temirni tortuvchi 21 / 25 Cho’ntak fanari lampochkasidagi kuchlanish 4,5 V, tok kuchi 0,2 A bo’lsa ,1minutdaqancha elektr energiya sarflanadi? A) 780 J B) 50 J C) 60 J D) 54 J 22 / 25 220 V kuchlanishda 0,25 A tok olib yonayotgan elektr lampochkadagi tokning quvvatini toping ? A) 500 W B) 550 W C) 55 W D) 5,5 W 23 / 25 Elektrolizdan foydalanib ,buyumlarning sirtini qiyin oksidlanadigan metallar bilan qoplash….deyiladi ? A) Ion bog’lanish B) Galvonastegiya C) eletrlolez D) Galvonaplastina 24 / 25 Bitta atom massasini topish formulasini ko’rsating ? A) m=µ/N B) ν=m/µ C) N=mn∆z D) to'g'ri javob yo'q 25 / 25 Natriy (Na) atomida nechta electron bor ? A) 9 ta B) 10 ta C) 12 ta D) 11 ta 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 Foydali bo'lsa mamnunmiz
