8-sinf Fizika 3-chorak May 5, 2021May 5, 2021 da chop etilgan InfoMaster tomonidan 8-sinf Fizika 3-chorak ga fikr bildirilmagan. 93 Tomonidan yaratilgan InfoMaster 8-sinf Fizika 3-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 25 Elektr zaryadlarini to’plash uchun mo’ljallangan asbob qanday nomlanadi? A) Ampermetr B) kondensator C) Areometr D) Voltmetr 2 / 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) 1 Ω D) 0.4 Ω 3 / 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) 44 V D) 110 V 4 / 25 bu shartli belgi qanday nomlanadi? A) Tok manbayi B) Qo’ng’iroq C) O’tkazgichlarning tutashtirmasdan kesishishi D) Kalit 5 / 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 6 / 25 Atom tuzilishi modulini kim kashf etgan ? A) Kulon B) Demokret C) Beruniy D) Rezerfort 7 / 25 Elektr zanjiridagi lampochkada parallel ulangan voltmeter 1,5 V ni ko’rsatmoqda. Lampochkadan 10 c zaryad o’tganda qancha ish bajariladi A) 15 J B) 155 J C) 20 J D) 220 J 8 / 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) 4 A B) 0,8 A C) 9 A D) 2 A 9 / 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) 12 V C) 25 V D) 15 V 10 / 25 Elektr zanjirlaridagi Lampochkadan 0,2 A tok o’moqda lampochka speraliorqali 1 minutda nechakulon zaryad o’tadi ? A) 10 C B) 15 C C) 12 C D) 24 C 11 / 25 Tok kuchining o'lchov birligi nima? A) Joul B) Kulon C) Volt D) Amper 12 / 25 Elektr qashiligi formulasi qaysi javobda keltirilgan? A) I=qt B) R=ρl/S C) R=U/I D) Q=I^2Rt 13 / 25 Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng? A) 500 kV B) 1,5 V C) 5V D) 220 V 14 / 25 Tok o’tayotgan o’tkazgich atrofida magnit maydon bor ekanligini ko’rsatgan tajriba qaysi olim nomi bilanbog’liq ? A) Amper B) Volta C) Joul D) Ersted 15 / 25 Natriy (Na) atomida nechta electron bor ? A) 9 ta B) 12 ta C) 11 ta D) 10 ta 16 / 25 Elektr tokining bajargan ishini formulasini ko’rsating toping ? A) Q=I^2RT B) R=UI C) J=q/t D) A=UIT 17 / 25 Abu Rayhon Beruniy o’z asarlarida magnitni qanday nom bilan atagan ? A) Suniy magnitlar B) Ohangrabo-temirni tortuvchi C) Tabiy magnitlar D) Doimiy magnitlar 18 / 25 220 V kuchlanishda 5 A tok olib ishlaydigan dazmolning quvvatini toping ? A) 220 W B) 110W C) 1,1 kW D) 100 W 19 / 25 Bitta atom massasini topish formulasini ko’rsating ? A) N=mn∆z B) m=µ/N C) to'g'ri javob yo'q D) ν=m/µ 20 / 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 21 / 25 1,5 soat davom etgan elektrolizda katodda 15 mg nikel yig’iladi.Elektroliz vaqtida eletrolitdan o’tagan tok kuchini toping ? A) 25 mA B) 35,5 mA C) 7 mA D) 9mA 22 / 25 1Vatt.soat necha Jaulga teng ? A) 5000 J B) 3600 J C) 360 J D) 5600 J 23 / 25 Yorug’lik tezligini birinchi bo’lib kim aniqlagan A) O.Ryomer B) Rezirfort C) Nyuton D) J.Uatt 24 / 25 Elektrolizdan foydalanib ,buyumlarning sirtini qiyin oksidlanadigan metallar bilan qoplash….deyiladi ? A) eletrlolez B) Galvonastegiya C) Galvonaplastina D) Ion bog’lanish 25 / 25 Elektr toki bajargan ishining asosiy birligi nima? A) Paskal B) Vatt sekund C) Volt 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