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 / 25 220 V kuchlanishda 0,25 A tok olib yonayotgan elektr lampochkadagi tokning quvvatini toping ? A) 500 W B) 5,5 W C) 55 W D) 550 W 2 / 25 Faradey doimiysining son qiymatini toping ? A) 96500 C/mol B) 8000C/mol C) 7800 C/mol D) 7200 C/mol 3 / 25 Tok o’tayotgan o’tkazgich atrofida magnit maydon bor ekanligini ko’rsatgan tajriba qaysi olim nomi bilanbog’liq ? A) Joul B) Amper C) Ersted D) Volta 4 / 25 Elektr tokining quvvati formulasini ko’rsating ? A) I=q/t B) N=A/t C) R=I/U D) P=IU 5 / 25 manbaning turli qutb (faza) laridan kelayotgan ichki elektr simi ochiq joyining bir-biriga tegib ketishi…….deyiladi? A) Zaryadlar B) qisqa tutashuv C) Elektr toki D) Tok kuchi 6 / 25 Elektrolizdan foydalanib ,buyumlarning sirtini qiyin oksidlanadigan metallar bilan qoplash….deyiladi ? A) Galvonaplastina B) eletrlolez C) Galvonastegiya D) Ion bog’lanish 7 / 25 Natriy (Na) atomida nechta electron bor ? A) 12 ta B) 10 ta C) 11 ta D) 9 ta 8 / 25 Elektr tokining bajargan ishini formulasini ko’rsating toping ? A) A=UIT B) J=q/t C) R=UI D) Q=I^2RT 9 / 25 1Vatt.soat necha Jaulga teng ? A) 5000 J B) 3600 J C) 360 J D) 5600 J 10 / 25 Ionlar orasida Kulon kuchi tufayli vijudga keladigan kimyoviy bog’lanish……deb ataladi? A) Ionli bog’lanish B) Kovalent bog’lanish C) Elektrolitlar D) Qutbli bog’lanish 11 / 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) 44 Ω C) 44.4 Ω D) 20 Ω 12 / 25 Temir moddasining (200C da) solishtirma qashiligi nechaga teng? A) 0,098 B) 0,4 C) 0.5 D) 0.017 13 / 25 Elektr janjiridagi lampochkadan ma’lum vaqt davomida 25 c zaryad o’tib , 75 J ish bajarildi,lampochka qanday elektr kuchlanish ostida yongan? A) 12 V B) 15 V C) 3 v D) 25 V 14 / 25 Elekt kuchlanishi formulasi berilgan javobni ko’rsating. A) E=U/d B) U=A|q C) I=q/t D) F=kq/r^2 15 / 25 Elektr zanjirida 2 m va ko’ndalang kesimining yuzi 0,5 mm2 bo’lgan nixrom simning qarshiligini toping ? A) 440 Ω B) 4,4 Ω C) 2,2 Ω D) 220 Ω 16 / 25 Elektr zanjirida ketma-ket ulangan iste`molchilar qarshiliklari 80, 120 va 200 Om dan iborat. Umumiy kuchlanish 220 V bo`lsa, uchinchi iste`molchidagi kuchlanish tushuvini toping A) 44 V B) 180 V C) 220 V D) 110 V 17 / 25 Elektrlanishning necha turi mavjud ? A) 5 B) 3 C) 4 D) 2 18 / 25 Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ? A) Dinomometr B) Elektroskop C) Elektrometr D) Barometr 19 / 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) 2 A C) 5 A D) 4 A 20 / 25 Zaryadli zarralarning tartibli harakati,ya’ni oqiminima deb nomlanadi? A) Musbat zaryad B) Zaryad C) Tok kuchi D) Elektr toki 21 / 25 Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi? A) to'g'ri javob yo'q B) Manfiy C) Musbat D) Elektrlanmaydi 22 / 25 O’lchami va shakli hisobga olinmaydigan zaryadlangan jism qanday nomlanadi ? A) Musbat zaryad B) Manfiy zaryad C) Elementar zaryad D) Nuqtaviy zaryad 23 / 25 Elektr zaryadlarini to’plash uchun mo’ljallangan asbob qanday nomlanadi? A) kondensator B) Voltmetr C) Areometr D) Ampermetr 24 / 25 Zaryadi -5*10-8 C bo’lgan nuqtaviy zaryadning 3 sm msofada hosil qilgan elektr maydon kuchlanganligini toping? A) 6*10⁴ N/C B) 5,1*10⁶ N/C C) 5*10⁵ N/C D) 5*10‾⁵ N/C 25 / 25 Akkumulator so’zining ma’nosi nima ? A) To’plovchi B) Zaryad oqimi C) Tok manbayi D) Zaryadlovchi 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