Uy » Choraklik online testlar » Fizika choraklik » 8-sinf Fizika 3-chorak Fizika choraklik 8-sinf Fizika 3-chorak InfoMaster May 5, 2021 1260 Ko'rishlar 1 izoh SaqlashSaqlanganOlib tashlandi 5 8 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) 4 ta B) 6 ta C) 2 ta D) 0 ta 2 / 25 Bitta elektron massasi nechaga teng ? A) 3,36*10^-32kg B) 9,1*10^-31kg C) 8,81*10^-19kg D) 1,6*10^-19kg 3 / 25 Akkumulator so’zining ma’nosi nima ? A) To’plovchi B) Tok manbayi C) Zaryad oqimi D) Zaryadlovchi 4 / 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) 5,4*10‾⁴ N B) 2*10‾⁸ N C) 5*10‾⁸ N D) 270 N 5 / 25 Elektr zaryadining o’lchov birligi nima ? A) volt B) kulon C) Amper D) Joul 6 / 25 Jismlarning elektrlanganligini sezish ,kuzatish uchun qo’llaniladigan asbob qanday nomlanadi ? A) Elektroskop B) Barametr C) spedometr D) Areometr 7 / 25 Zaryadli zarralarning tartibli harakati,ya’ni oqiminima deb nomlanadi? A) Musbat zaryad B) Tok kuchi C) Zaryad D) Elektr toki 8 / 25 Ikkita o`tkazgichlar avval ketma- ket, so`ngra parallel ulandi. Bunda uning umumiy qarsiligi qanday o`zgaradi? A) o`zgarmaydi B) 2 marta kamayadi C) 4 marta kamaydi D) 2 marta ortadi 9 / 25 Zaryadi -5*10-8 C bo’lgan nuqtaviy zaryadning 3 sm msofada hosil qilgan elektr maydon kuchlanganligini toping? A) 5,1*10⁶ N/C B) 5*10‾⁵ N/C C) 6*10⁴ N/C D) 5*10⁵ N/C 10 / 25 Elektr doimiysining son qiymati nechaga teng? A) 8,85*10^-12C^2/N*m^2 B) 3*10^-19 C C) 9,1*10^-31kg D) -3*10^-19 C 11 / 25 Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan? A) yunon olimi Aristotel B) hamma javoblar to'g'ri C) grek olimi Arximed D) yunon olimi Fales Miletskiy 12 / 25 Bitta elektron zaryadi nechaga teng ? A) 1,6*10^-19C B) 8,81*10^-19 C) 2,01*10^-19C D) 9,1*10^-31C 13 / 25 Rezistor uchlaridagi kuchlanish 9 V ga teng . Unda 0,5 A tok utishi uchun uning qarshiligi qancha bo’lishi kerak ? A) 44 Ω B) 18 Ω C) 20 Ω D) 44.4 Ω 14 / 25 Rezistor so’zining manosi nima ? A) Kuchlanish B) Qarshilik C) Zaryad D) Tok kuchi 15 / 25 Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ? A) 0.4 A B) 0,1 A C) 0,2 A D) 0,5 A 16 / 25 Elektr qarshiligi qaysi harf bilan belgilanadi? A) L B) J C) U D) R 17 / 25 Elekt kuchlanishining ulchov birligi nima? A) Volt B) Sekund C) Amper D) Kulon 18 / 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) 3 v C) 15 V D) 12 V 19 / 25 Elekt kuchlanishi formulasi berilgan javobni ko’rsating. A) U=A|q B) I=q/t C) E=U/d D) F=kq/r^2 20 / 25 Elektr zanjirda tokni rostlash uchun qo’llaniladigan turli qarshilikli elektr asbobi qanday nomlanadi ? A) potensiyometr B) elektrometr C) rezistor D) elektroskop 21 / 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) 2 A C) 9 A D) 0,8 A 22 / 25 Necha volt kuchlanishli elektr tarmoq odam organizmi uchun xavflihisoblanadi? A) 36 V dan yuqori B) 30 V dan yuqori C) 220 V dan yuqori D) 300 Vdan yuqori 23 / 25 1,5 soat davom etgan elektrolizda katodda 15 mg nikel yig’iladi.Elektroliz vaqtida eletrolitdan o’tagan tok kuchini toping ? A) 9mA B) 25 mA C) 35,5 mA D) 7 mA 24 / 25 Elektr tokining quvvati formulasini ko’rsating ? A) R=I/U B) I=q/t C) N=A/t D) P=IU 25 / 25 220 V kuchlanishda 5 A tok olib ishlaydigan dazmolning quvvatini toping ? A) 1,1 kW B) 100 W C) 220 W D) 110W 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
