Uy » Choraklik online testlar » Fizika choraklik » 8-sinf Fizika 3-chorak Fizika choraklik 8-sinf Fizika 3-chorak InfoMaster May 5, 2021 624 Ko'rishlar 1 izoh SaqlashSaqlanganOlib tashlandi 3 1 Tomonidan yaratilgan InfoMaster 8-sinf Fizika 3-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 25 Ikkita o`tkazgichlar avval ketma- ket, so`ngra parallel ulandi. Bunda uning umumiy qarsiligi qanday o`zgaradi? A) 2 marta kamayadi B) 4 marta kamaydi C) 2 marta ortadi D) o`zgarmaydi 2 / 25 bu shartli belgi qanday nomlanadi? A) Tok manbayi B) Qo’ng’iroq C) O’tkazgichlarning tutashtirmasdan kesishishi D) Kalit 3 / 25 Qarshiliklari 200 Ω va 300 Ω bo`lgan ikkita elektr lampa parallel ulanib, 240 V tarmoqqa kiritilgan. Umumiy tok kattaligini toping. A) 1.8 A B) 5 A C) 4 A D) 2 A 4 / 25 O’lchami va shakli hisobga olinmaydigan zaryadlangan jism qanday nomlanadi ? A) Elementar zaryad B) Musbat zaryad C) Manfiy zaryad D) Nuqtaviy zaryad 5 / 25 Elektrlanishning necha turi mavjud ? A) 5 B) 4 C) 2 D) 3 6 / 25 Elektr sig’imining o’lchov birligi nima ? A) amper B) Kulon C) Sekund D) Farad 7 / 25 Atom so’zining ma’nosi nima ? A) Elektr zaryat B) Bo’linmas C) Musbat zaryad D) Zaryad 8 / 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) 270 N B) 2*10‾⁸ N C) 5,4*10‾⁴ N D) 5*10‾⁸ N 9 / 25 Elektr doimiysining son qiymati nechaga teng? A) -3*10^-19 C B) 3*10^-19 C C) 8,85*10^-12C^2/N*m^2 D) 9,1*10^-31kg 10 / 25 manbaning turli qutb (faza) laridan kelayotgan ichki elektr simi ochiq joyining bir-biriga tegib ketishi…….deyiladi? A) Zaryadlar B) Tok kuchi C) Elektr toki D) qisqa tutashuv 11 / 25 1,5 soat davom etgan elektrolizda katodda 15 mg nikel yig’iladi.Elektroliz vaqtida eletrolitdan o’tagan tok kuchini toping ? A) 9mA B) 35,5 mA C) 7 mA D) 25 mA 12 / 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 13 / 25 Yorug’lik tezligini birinchi bo’lib kim aniqlagan A) J.Uatt B) Rezirfort C) O.Ryomer D) Nyuton 14 / 25 Natriy (Na) atomida nechta electron bor ? A) 12 ta B) 11 ta C) 9 ta D) 10 ta 15 / 25 220 V kuchlanishda 0,25 A tok olib yonayotgan elektr lampochkadagi tokning quvvatini toping ? A) 55 W B) 500 W C) 550 W D) 5,5 W 16 / 25 Elektrolizdan foydalanib ,buyumlarning sirtini qiyin oksidlanadigan metallar bilan qoplash….deyiladi ? A) Ion bog’lanish B) Galvonaplastina C) Galvonastegiya D) eletrlolez 17 / 25 Temir moddasining (200C da) solishtirma qashiligi nechaga teng? A) 0.5 B) 0,4 C) 0.017 D) 0,098 18 / 25 Elektr zanjirda tokni rostlash uchun qo’llaniladigan turli qarshilikli elektr asbobi qanday nomlanadi ? A) elektroskop B) potensiyometr C) rezistor D) elektrometr 19 / 25 Elekt kuchlanishi formulasi berilgan javobni ko’rsating. A) I=q/t B) E=U/d C) U=A|q D) F=kq/r^2 20 / 25 Kuchlanishni o’lchaydigan asbob nima diyeladi? A) voltmeter B) elektroskop C) elektrometr D) ampermetr 21 / 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 22 / 25 Rezistor so’zining manosi nima ? A) Kuchlanish B) Qarshilik C) Zaryad D) Tok kuchi 23 / 25 Elektr qashiligi formulasi qaysi javobda keltirilgan? A) Q=I^2Rt B) I=qt C) R=U/I D) R=ρl/S 24 / 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) 0,8 A B) 2 A C) 9 A D) 4 A 25 / 25 Elektr zanjirlaridagi Lampochkadan 0,2 A tok o’moqda lampochka speraliorqali 1 minutda nechakulon zaryad o’tadi ? A) 12 C B) 15 C C) 10 C D) 24 C 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
