Uy » Choraklik online testlar » Fizika choraklik » 8-sinf Fizika 3-chorak Fizika choraklik 8-sinf Fizika 3-chorak InfoMaster May 5, 2021 1169 Ko'rishlar 1 izoh SaqlashSaqlanganOlib tashlandi 5 3 Tomonidan yaratilgan InfoMaster 8-sinf Fizika 3-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 25 Atom yadrosida ikkita proton va ikkita neytron bor. Undagi elektronlar soni nechta? A) 0 ta B) 4 ta C) 6 ta D) 2 ta 2 / 25 Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan? A) hamma javoblar to'g'ri B) yunon olimi Aristotel C) yunon olimi Fales Miletskiy D) grek olimi Arximed 3 / 25 Jismlarning elektrlanganligini sezish ,kuzatish uchun qo’llaniladigan asbob qanday nomlanadi ? A) Areometr B) Barametr C) spedometr D) Elektroskop 4 / 25 Elektrlanishning necha turi mavjud ? A) 3 B) 2 C) 4 D) 5 5 / 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) 4 A C) 2 A D) 1.8 A 6 / 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) 44 V C) 220 V D) 110 V 7 / 25 Atom tuzilishi modulini kim kashf etgan ? A) Kulon B) Beruniy C) Rezerfort D) Demokret 8 / 25 Akkumulator so’zining ma’nosi nima ? A) To’plovchi B) Zaryadlovchi C) Tok manbayi D) Zaryad oqimi 9 / 25 Natriy (Na) atomida nechta electron bor ? A) 10 ta B) 12 ta C) 9 ta D) 11 ta 10 / 25 Necha volt kuchlanishli elektr tarmoq odam organizmi uchun xavflihisoblanadi? A) 300 Vdan yuqori B) 36 V dan yuqori C) 220 V dan yuqori D) 30 V dan yuqori 11 / 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) 9mA C) 35,5 mA D) 7 mA 12 / 25 Elektrolidan tok o’tayotganda elektrodlarda modda ajralib chiqish hodisasi……deb ataladi A) Eletroliz B) Ion bog’lanish C) Turli eritma D) Suvli eritma 13 / 25 220 V kuchlanishda 5 A tok olib ishlaydigan dazmolning quvvatini toping ? A) 220 W B) 100 W C) 110W D) 1,1 kW 14 / 25 Faradey doimiysining son qiymatini toping ? A) 96500 C/mol B) 8000C/mol C) 7200 C/mol D) 7800 C/mol 15 / 25 Elektr toki bajargan ishining asosiy birligi nima? A) amper B) Volt C) Paskal D) Vatt sekund 16 / 25 Bitta atom massasini topish formulasini ko’rsating ? A) N=mn∆z B) to'g'ri javob yo'q C) m=µ/N D) ν=m/µ 17 / 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) 25 V C) 3 v D) 15 V 18 / 25 Elekt kuchlanishining ulchov birligi nima? A) Kulon B) Sekund C) Amper D) Volt 19 / 25 Elektr zanjirlaridagi Lampochkadan 0,2 A tok o’moqda lampochka speraliorqali 1 minutda nechakulon zaryad o’tadi ? A) 12 C B) 24 C C) 10 C D) 15 C 20 / 25 Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ? A) 0,5 A B) 0,2 A C) 0.4 A D) 0,1 A 21 / 25 Elektr zanjirda tokni rostlash uchun qo’llaniladigan turli qarshilikli elektr asbobi qanday nomlanadi ? A) elektrometr B) potensiyometr C) elektroskop D) rezistor 22 / 25 Elekt kuchlanishi formulasi berilgan javobni ko’rsating. A) E=U/d B) U=A|q C) I=q/t D) F=kq/r^2 23 / 25 Elektr qarshiligi qaysi harf bilan belgilanadi? A) J B) U C) L D) R 24 / 25 Elektr zanjirida 2 m va ko’ndalang kesimining yuzi 0,5 mm2 bo’lgan nixrom simning qarshiligini toping ? A) 220 Ω B) 4,4 Ω C) 440 Ω D) 2,2 Ω 25 / 25 Elektr zanjiridagi lampochkada parallel ulangan voltmeter 1,5 V ni ko’rsatmoqda. Lampochkadan 10 c zaryad o’tganda qancha ish bajariladi A) 220 J B) 20 J C) 15 J D) 155 J 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
