Uy » Choraklik online testlar » Fizika choraklik » 8-sinf Fizika 3-chorak Fizika choraklik 8-sinf Fizika 3-chorak InfoMaster May 5, 2021 1290 Ko'rishlar 1 izoh SaqlashSaqlanganOlib tashlandi 5 9 Tomonidan yaratilgan InfoMaster 8-sinf Fizika 3-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 25 Elektr zanjiridagi lampochkadan 5 minutda 30 C zaryad o’tgani ma’lum. Zanjirdagi ampermetr lampochkadan qancha tok o’tayotganini ko’rsating? A) 6 A B) 0,4 A C) 0,5 A D) 0,1 A 2 / 25 Elekt kuchlanishi formulasi berilgan javobni ko’rsating. A) F=kq/r^2 B) E=U/d C) U=A|q D) I=q/t 3 / 25 Elektr zanjirlaridagi Lampochkadan 0,2 A tok o’moqda lampochka speraliorqali 1 minutda nechakulon zaryad o’tadi ? A) 24 C B) 12 C C) 10 C D) 15 C 4 / 25 Temir moddasining (200C da) solishtirma qashiligi nechaga teng? A) 0,4 B) 0,098 C) 0.017 D) 0.5 5 / 25 Atom so’zining ma’nosi nima ? A) Elektr zaryat B) Musbat zaryad C) Zaryad D) Bo’linmas 6 / 25 Atom yadrosida ikkita proton va ikkita neytron bor. Undagi elektronlar soni nechta? A) 2 ta B) 6 ta C) 0 ta D) 4 ta 7 / 25 Jismlarning elektrlanganligini sezish ,kuzatish uchun qo’llaniladigan asbob qanday nomlanadi ? A) Elektroskop B) spedometr C) Areometr D) Barametr 8 / 25 Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi? A) Manfiy B) to'g'ri javob yo'q C) Musbat D) Elektrlanmaydi 9 / 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) 2*10‾⁸ N B) 5,4*10‾⁴ N C) 270 N D) 5*10‾⁸ N 10 / 25 Ikkita o`tkazgichlar avval ketma- ket, so`ngra parallel ulandi. Bunda uning umumiy qarsiligi qanday o`zgaradi? A) 4 marta kamaydi B) 2 marta kamayadi C) o`zgarmaydi D) 2 marta ortadi 11 / 25 Elektr zaryadining o’lchov birligi nima ? A) Amper B) kulon C) volt D) Joul 12 / 25 Bitta elektron massasi nechaga teng ? A) 1,6*10^-19kg B) 9,1*10^-31kg C) 8,81*10^-19kg D) 3,36*10^-32kg 13 / 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 14 / 25 Elektr zaryadlarini to’plash uchun mo’ljallangan asbob qanday nomlanadi? A) Ampermetr B) Voltmetr C) kondensator D) Areometr 15 / 25 Bug’ mashinasini kim kashf etgan ? A) Jems Uatt B) Volta C) Kulon D) Amper 16 / 25 Gaz orqali elektr toki o’tish jarayoni …..deyiladi ? A) Gaz razryadi B) Elektroliz C) Uchqun D) Ion bog’lanish 17 / 25 Cho’ntak fanari lampochkasidagi kuchlanish 4,5 V, tok kuchi 0,2 A bo’lsa ,1minutdaqancha elektr energiya sarflanadi? A) 60 J B) 50 J C) 780 J D) 54 J 18 / 25 Elektr toki bajargan ishining asosiy birligi nima? A) Paskal B) amper C) Volt D) Vatt sekund 19 / 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) 9mA D) 35,5 mA 20 / 25 Elektr tokining quvvati formulasini ko’rsating ? A) R=I/U B) I=q/t C) N=A/t D) P=IU 21 / 25 Ionlar orasida Kulon kuchi tufayli vijudga keladigan kimyoviy bog’lanish……deb ataladi? A) Kovalent bog’lanish B) Qutbli bog’lanish C) Elektrolitlar D) Ionli bog’lanish 22 / 25 Necha volt kuchlanishli elektr tarmoq odam organizmi uchun xavflihisoblanadi? A) 220 V dan yuqori B) 30 V dan yuqori C) 36 V dan yuqori D) 300 Vdan yuqori 23 / 25 Tok o’tayotgan o’tkazgich atrofida magnit maydon bor ekanligini ko’rsatgan tajriba qaysi olim nomi bilanbog’liq ? A) Joul B) Ersted C) Amper D) Volta 24 / 25 Elektr tokining bajargan ishini formulasini ko’rsating toping ? A) A=UIT B) R=UI C) J=q/t D) Q=I^2RT 25 / 25 220 V kuchlanishda 5 A tok olib ishlaydigan dazmolning quvvatini toping ? A) 100 W B) 220 W C) 110W D) 1,1 kW 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
