8-sinf Fizika 3-chorak May 5, 2021May 5, 2021 da chop etilgan InfoMaster tomonidan 8-sinf Fizika 3-chorak ga 1 fikr bildirilgan 1 Tomonidan yaratilgan InfoMaster 8-sinf Fizika 3-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 25 O’lchami va shakli hisobga olinmaydigan zaryadlangan jism qanday nomlanadi ? A) Musbat zaryad B) Elementar zaryad C) Manfiy zaryad D) Nuqtaviy zaryad 2 / 25 Qarshiliklari 200 Ω va 300 Ω bo`lgan ikkita elektr lampa parallel ulanib, 240 V tarmoqqa kiritilgan. Umumiy tok kattaligini toping. A) 4 A B) 5 A C) 1.8 A D) 2 A 3 / 25 Bitta elektron massasi nechaga teng ? A) 3,36*10^-32kg B) 8,81*10^-19kg C) 9,1*10^-31kg D) 1,6*10^-19kg 4 / 25 Elektr doimiysining son qiymati nechaga teng? A) 9,1*10^-31kg B) -3*10^-19 C C) 8,85*10^-12C^2/N*m^2 D) 3*10^-19 C 5 / 25 Zaryadli zarralarning tartibli harakati,ya’ni oqiminima deb nomlanadi? A) Tok kuchi B) Zaryad C) Musbat zaryad D) Elektr toki 6 / 25 Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi? A) Musbat B) Elektrlanmaydi C) Manfiy D) to'g'ri javob yo'q 7 / 25 Bitta elektron zaryadi nechaga teng ? A) 8,81*10^-19 B) 1,6*10^-19C C) 9,1*10^-31C D) 2,01*10^-19C 8 / 25 Akkumulator so’zining ma’nosi nima ? A) To’plovchi B) Zaryadlovchi C) Tok manbayi D) Zaryad oqimi 9 / 25 Tok kuchining o'lchov birligi nima? A) Joul B) Amper C) Volt D) Kulon 10 / 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) 2 A B) 0,8 A C) 4 A D) 9 A 11 / 25 Elektr zanjirlaridagi Lampochkadan 0,2 A tok o’moqda lampochka speraliorqali 1 minutda nechakulon zaryad o’tadi ? A) 15 C B) 12 C C) 24 C D) 10 C 12 / 25 Elekt kuchlanishining ulchov birligi nima? A) Amper B) Volt C) Kulon D) Sekund 13 / 25 Rezistor uchlaridagi kuchlanish 9 V ga teng . Unda 0,5 A tok utishi uchun uning qarshiligi qancha bo’lishi kerak ? A) 18 Ω B) 20 Ω C) 44 Ω D) 44.4 Ω 14 / 25 Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng? A) 500 kV B) 220 V C) 5V D) 1,5 V 15 / 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) 2,2 Ω D) 440 Ω 16 / 25 Elektrolizdan foydalanib ,buyumlarning sirtini qiyin oksidlanadigan metallar bilan qoplash….deyiladi ? A) Ion bog’lanish B) Galvonaplastina C) eletrlolez D) Galvonastegiya 17 / 25 220 V kuchlanishda 0,25 A tok olib yonayotgan elektr lampochkadagi tokning quvvatini toping ? A) 550 W B) 55 W C) 500 W D) 5,5 W 18 / 25 Elektrolidan tok o’tayotganda elektrodlarda modda ajralib chiqish hodisasi……deb ataladi A) Eletroliz B) Suvli eritma C) Turli eritma D) Ion bog’lanish 19 / 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) 7 mA D) 35,5 mA 20 / 25 1Vatt.soat necha Jaulga teng ? A) 3600 J B) 360 J C) 5000 J D) 5600 J 21 / 25 Elektr tokining bajargan ishini formulasini ko’rsating toping ? A) A=UIT B) J=q/t C) Q=I^2RT D) R=UI 22 / 25 Bug’ mashinasini kim kashf etgan ? A) Jems Uatt B) Amper C) Kulon D) Volta 23 / 25 Cho’ntak fanari lampochkasidagi kuchlanish 4,5 V, tok kuchi 0,2 A bo’lsa ,1minutdaqancha elektr energiya sarflanadi? A) 50 J B) 780 J C) 54 J D) 60 J 24 / 25 Ionlar orasida Kulon kuchi tufayli vijudga keladigan kimyoviy bog’lanish……deb ataladi? A) Kovalent bog’lanish B) Elektrolitlar C) Qutbli bog’lanish D) Ionli bog’lanish 25 / 25 Necha volt kuchlanishli elektr tarmoq odam organizmi uchun xavflihisoblanadi? A) 220 V dan yuqori B) 36 V dan yuqori C) 30 V dan yuqori D) 300 Vdan yuqori 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 tomonidan Wordpress Quiz plugin Fizika choraklik
