8-sinf Fizika 3-chorak May 5, 2021May 5, 2021 da chop etilgan InfoMaster tomonidan 8-sinf Fizika 3-chorak ga fikr bildirilmagan. 115 8-sinf Fizika 3-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 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 2 / 25 Tok kuchini o’lchaydigan asbob qanday nomlanadi ? A) Voltmetr B) Elektroskop C) Ampermetr D) Elektrometr 3 / 25 Elektr zanjiridagi lampochkadan 5 minutda 30 C zaryad o’tgani ma’lum. Zanjirdagi ampermetr lampochkadan qancha tok o’tayotganini ko’rsating? A) 0,5 A B) 6 A C) 0,1 A D) 0,4 A 4 / 25 Elektr zanjirida 2 m va ko’ndalang kesimining yuzi 0,5 mm2 bo’lgan nixrom simning qarshiligini toping ? A) 2,2 Ω B) 440 Ω C) 4,4 Ω D) 220 Ω 5 / 25 Elektr qarshiligi qaysi harf bilan belgilanadi? A) L B) U C) J D) R 6 / 25 Tok kuchining o'lchov birligi nima? A) Amper B) Joul C) Volt D) Kulon 7 / 25 Temir moddasining (200C da) solishtirma qashiligi nechaga teng? A) 0,098 B) 0,4 C) 0.5 D) 0.017 8 / 25 Elektr qashiligi formulasi qaysi javobda keltirilgan? A) R=U/I B) Q=I^2Rt C) R=ρl/S D) I=qt 9 / 25 Akkumulator so’zining ma’nosi nima ? A) Tok manbayi B) Zaryad oqimi C) Zaryadlovchi D) To’plovchi 10 / 25 bu shartli belgi qanday nomlanadi? A) O’tkazgichlarning tutashtirmasdan kesishishi B) Qo’ng’iroq C) Kalit D) Tok manbayi 11 / 25 Elektr zaryadining o’lchov birligi nima ? A) Joul B) Amper C) volt D) kulon 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) 2 A C) 4 A D) 1.8 A 13 / 25 Elektr doimiysining son qiymati nechaga teng? A) 3*10^-19 C B) 9,1*10^-31kg C) -3*10^-19 C D) 8,85*10^-12C^2/N*m^2 14 / 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) 5,4*10‾⁴ N D) 2*10‾⁸ N 15 / 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) 5,1*10⁶ N/C C) 5*10‾⁵ N/C D) 6*10⁴ N/C 16 / 25 Atom yadrosida ikkita proton va ikkita neytron bor. Undagi elektronlar soni nechta? A) 0 ta B) 2 ta C) 4 ta D) 6 ta 17 / 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) 0.4 Ω B) 0.2 Ω C) 0.5 Ω D) 1 Ω 18 / 25 Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi? A) Musbat B) Manfiy C) to'g'ri javob yo'q D) Elektrlanmaydi 19 / 25 Bitta elektron massasi nechaga teng ? A) 1,6*10^-19kg B) 3,36*10^-32kg C) 9,1*10^-31kg D) 8,81*10^-19kg 20 / 25 Elektr zaryadlarini to’plash uchun mo’ljallangan asbob qanday nomlanadi? A) kondensator B) Areometr C) Ampermetr D) Voltmetr 21 / 25 Elektrolidan tok o’tayotganda elektrodlarda modda ajralib chiqish hodisasi……deb ataladi A) Turli eritma B) Eletroliz C) Suvli eritma D) Ion bog’lanish 22 / 25 Gaz orqali elektr toki o’tish jarayoni …..deyiladi ? A) Gaz razryadi B) Elektroliz C) Ion bog’lanish D) Uchqun 23 / 25 Tok o’tayotgan o’tkazgich atrofida magnit maydon bor ekanligini ko’rsatgan tajriba qaysi olim nomi bilanbog’liq ? A) Volta B) Ersted C) Amper D) Joul 24 / 25 Cho’ntak fanari lampochkasidagi kuchlanish 4,5 V, tok kuchi 0,2 A bo’lsa ,1minutdaqancha elektr energiya sarflanadi? A) 50 J B) 54 J C) 780 J D) 60 J 25 / 25 Yorug’lik tezligini birinchi bo’lib kim aniqlagan A) O.Ryomer B) Nyuton C) J.Uatt D) Rezirfort 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