Uy » Choraklik online testlar » Fizika choraklik » 8-sinf Fizika 3-chorak Fizika choraklik 8-sinf Fizika 3-chorak InfoMaster May 5, 2021 777 Ko'rishlar 1 izoh SaqlashSaqlanganOlib tashlandi 4 2 Tomonidan yaratilgan InfoMaster 8-sinf Fizika 3-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 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*10‾⁵ N/C C) 6*10⁴ N/C D) 5,1*10⁶ N/C 2 / 25 Elektr zaryadlarini to’plash uchun mo’ljallangan asbob qanday nomlanadi? A) Areometr B) kondensator C) Ampermetr D) Voltmetr 3 / 25 Zaryadli zarralarning tartibli harakati,ya’ni oqiminima deb nomlanadi? A) Tok kuchi B) Musbat zaryad C) Zaryad D) Elektr toki 4 / 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) 180 V B) 44 V C) 110 V D) 220 V 5 / 25 Atom yadrosida ikkita proton va ikkita neytron bor. Undagi elektronlar soni nechta? A) 6 ta B) 2 ta C) 4 ta D) 0 ta 6 / 25 Atom so’zining ma’nosi nima ? A) Bo’linmas B) Elektr zaryat C) Musbat zaryad D) Zaryad 7 / 25 Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi? A) Elektrlanmaydi B) to'g'ri javob yo'q C) Musbat D) Manfiy 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) 2*10‾⁸ N B) 270 N C) 5*10‾⁸ N D) 5,4*10‾⁴ N 9 / 25 Elektr qashiligi formulasi qaysi javobda keltirilgan? A) Q=I^2Rt B) I=qt C) R=ρl/S D) R=U/I 10 / 25 Kuchlanishni o’lchaydigan asbob nima diyeladi? A) elektroskop B) elektrometr C) ampermetr D) voltmeter 11 / 25 Tok kuchining o'lchov birligi nima? A) Amper B) Kulon C) Volt D) Joul 12 / 25 Elektr qarshiligi qaysi harf bilan belgilanadi? A) L B) R C) J D) U 13 / 25 Rezistor uchlaridagi kuchlanish 9 V ga teng . Unda 0,5 A tok utishi uchun uning qarshiligi qancha bo’lishi kerak ? A) 44.4 Ω B) 20 Ω C) 44 Ω D) 18 Ω 14 / 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 15 / 25 Tok kuchi formulasi keltirilgan javobni aniqlang? A) U=A/q B) Q=ItU C) I=q/t D) R=U/I 16 / 25 Yorug’lik tezligini birinchi bo’lib kim aniqlagan A) J.Uatt B) Nyuton C) O.Ryomer D) Rezirfort 17 / 25 Natriy (Na) atomida nechta electron bor ? A) 9 ta B) 11 ta C) 10 ta D) 12 ta 18 / 25 Gaz orqali elektr toki o’tish jarayoni …..deyiladi ? A) Uchqun B) Gaz razryadi C) Ion bog’lanish D) Elektroliz 19 / 25 Elektrolidan tok o’tayotganda elektrodlarda modda ajralib chiqish hodisasi……deb ataladi A) Turli eritma B) Ion bog’lanish C) Suvli eritma D) Eletroliz 20 / 25 Cho’ntak fanari lampochkasidagi kuchlanish 4,5 V, tok kuchi 0,2 A bo’lsa ,1minutdaqancha elektr energiya sarflanadi? A) 54 J B) 60 J C) 780 J D) 50 J 21 / 25 Bitta atom massasini topish formulasini ko’rsating ? A) to'g'ri javob yo'q B) ν=m/µ C) N=mn∆z D) m=µ/N 22 / 25 Necha volt kuchlanishli elektr tarmoq odam organizmi uchun xavflihisoblanadi? A) 30 V dan yuqori B) 300 Vdan yuqori C) 220 V dan yuqori D) 36 V dan yuqori 23 / 25 Elektrolizdan foydalanib ,buyumlarning sirtini qiyin oksidlanadigan metallar bilan qoplash….deyiladi ? A) Ion bog’lanish B) Galvonastegiya C) eletrlolez D) Galvonaplastina 24 / 25 Elektr tokining quvvati formulasini ko’rsating ? A) I=q/t B) R=I/U C) N=A/t D) P=IU 25 / 25 Ionlar orasida Kulon kuchi tufayli vijudga keladigan kimyoviy bog’lanish……deb ataladi? A) Elektrolitlar B) Qutbli bog’lanish C) Ionli bog’lanish D) Kovalent bog’lanish 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
