Uy » Choraklik online testlar » Fizika choraklik » 8-sinf Fizika 3-chorak Fizika choraklik 8-sinf Fizika 3-chorak InfoMaster May 5, 2021 1027 Ko'rishlar 1 izoh SaqlashSaqlanganOlib tashlandi 5 3 Tomonidan yaratilgan InfoMaster 8-sinf Fizika 3-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 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) 9mA C) 35,5 mA D) 25 mA 2 / 25 Elektr toki bajargan ishining asosiy birligi nima? A) Vatt sekund B) Volt C) amper D) Paskal 3 / 25 Yorug’lik tezligini birinchi bo’lib kim aniqlagan A) O.Ryomer B) Rezirfort C) Nyuton D) J.Uatt 4 / 25 Bug’ mashinasini kim kashf etgan ? A) Volta B) Jems Uatt C) Kulon D) Amper 5 / 25 Natriy (Na) atomida nechta electron bor ? A) 12 ta B) 10 ta C) 9 ta D) 11 ta 6 / 25 Elektr tokining quvvati formulasini ko’rsating ? A) N=A/t B) I=q/t C) R=I/U D) P=IU 7 / 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 8 / 25 Necha volt kuchlanishli elektr tarmoq odam organizmi uchun xavflihisoblanadi? A) 30 V dan yuqori B) 220 V dan yuqori C) 300 Vdan yuqori D) 36 V dan yuqori 9 / 25 Elektrlanishning necha turi mavjud ? A) 5 B) 4 C) 2 D) 3 10 / 25 Elektr sig’imining o’lchov birligi nima ? A) Sekund B) amper C) Farad D) Kulon 11 / 25 Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan? A) hamma javoblar to'g'ri B) yunon olimi Fales Miletskiy C) yunon olimi Aristotel D) grek olimi Arximed 12 / 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 13 / 25 Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ? A) Barometr B) Elektrometr C) Elektroskop D) Dinomometr 14 / 25 Atom tuzilishi modulini kim kashf etgan ? A) Rezerfort B) Kulon C) Demokret D) Beruniy 15 / 25 Bitta elektron massasi nechaga teng ? A) 9,1*10^-31kg B) 8,81*10^-19kg C) 3,36*10^-32kg D) 1,6*10^-19kg 16 / 25 Elektr zaryadlarini to’plash uchun mo’ljallangan asbob qanday nomlanadi? A) kondensator B) Ampermetr C) Voltmetr D) Areometr 17 / 25 Zaryadi -5*10-8 C bo’lgan nuqtaviy zaryadning 3 sm msofada hosil qilgan elektr maydon kuchlanganligini toping? A) 5*10⁵ N/C B) 5*10‾⁵ N/C C) 5,1*10⁶ N/C D) 6*10⁴ N/C 18 / 25 Akkumulator so’zining ma’nosi nima ? A) Zaryadlovchi B) Zaryad oqimi C) To’plovchi D) Tok manbayi 19 / 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) 44 V B) 220 V C) 180 V D) 110 V 20 / 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) 2*10‾⁸ N D) 5,4*10‾⁴ N 21 / 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) 220 J C) 20 J D) 155 J 22 / 25 Elektr zanjiridagi lampochkadan 5 minutda 30 C zaryad o’tgani ma’lum. Zanjirdagi ampermetr lampochkadan qancha tok o’tayotganini ko’rsating? A) 0,1 A B) 0,5 A C) 0,4 A D) 6 A 23 / 25 Tok kuchining o'lchov birligi nima? A) Volt B) Kulon C) Joul D) Amper 24 / 25 Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ? A) 0.4 A B) 0,1 A C) 0,5 A D) 0,2 A 25 / 25 Kuchlanishni o’lchaydigan asbob nima diyeladi? A) elektroskop B) elektrometr C) voltmeter D) ampermetr 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
