Uy » Choraklik online testlar » Fizika choraklik » 8-sinf Fizika 3-chorak Fizika choraklik 8-sinf Fizika 3-chorak InfoMaster May 5, 2021 1254 Ko'rishlar 1 izoh SaqlashSaqlanganOlib tashlandi 5 8 Tomonidan yaratilgan InfoMaster 8-sinf Fizika 3-chorak Testni Shirinboyev Temurbek tayyorladi. 1 / 25 Cho’ntak fanari lampochkasidagi kuchlanish 4,5 V, tok kuchi 0,2 A bo’lsa ,1minutdaqancha elektr energiya sarflanadi? A) 60 J B) 50 J C) 780 J D) 54 J 2 / 25 Tok o’tayotgan o’tkazgich atrofida magnit maydon bor ekanligini ko’rsatgan tajriba qaysi olim nomi bilanbog’liq ? A) Volta B) Amper C) Ersted D) Joul 3 / 25 Yorug’lik tezligini birinchi bo’lib kim aniqlagan A) J.Uatt B) Nyuton C) Rezirfort D) O.Ryomer 4 / 25 1Vatt.soat necha Jaulga teng ? A) 3600 J B) 360 J C) 5000 J D) 5600 J 5 / 25 Elektrolidan tok o’tayotganda elektrodlarda modda ajralib chiqish hodisasi……deb ataladi A) Eletroliz B) Suvli eritma C) Ion bog’lanish D) Turli eritma 6 / 25 Necha volt kuchlanishli elektr tarmoq odam organizmi uchun xavflihisoblanadi? A) 220 V dan yuqori B) 300 Vdan yuqori C) 30 V dan yuqori D) 36 V dan yuqori 7 / 25 Elektr tokining quvvati formulasini ko’rsating ? A) N=A/t B) R=I/U C) P=IU D) I=q/t 8 / 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 9 / 25 220 V kuchlanishda 5 A tok olib ishlaydigan dazmolning quvvatini toping ? A) 100 W B) 110W C) 1,1 kW D) 220 W 10 / 25 Qahrabo so’zining ma’nosi nima ? A) Qattiq rezina B) Manfiy C) Somon tortuvchi D) Elektrlanuvchi 11 / 25 Zaryadi -5*10-8 C bo’lgan nuqtaviy zaryadning 3 sm msofada hosil qilgan elektr maydon kuchlanganligini toping? A) 5,1*10⁶ N/C B) 5*10‾⁵ N/C C) 5*10⁵ N/C D) 6*10⁴ N/C 12 / 25 Bitta elektron zaryadi nechaga teng ? A) 9,1*10^-31C B) 8,81*10^-19 C) 1,6*10^-19C D) 2,01*10^-19C 13 / 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) 5*10‾⁸ N C) 270 N D) 5,4*10‾⁴ N 14 / 25 Elektr doimiysining son qiymati nechaga teng? A) -3*10^-19 C B) 3*10^-19 C C) 9,1*10^-31kg D) 8,85*10^-12C^2/N*m^2 15 / 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) 0.5 Ω B) 0.4 Ω C) 1 Ω D) 0.2 Ω 16 / 25 bu shartli belgi qanday nomlanadi? A) Qo’ng’iroq B) Tok manbayi C) Kalit D) O’tkazgichlarning tutashtirmasdan kesishishi 17 / 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) 9 A B) 4 A C) 0,8 A D) 2 A 18 / 25 Elekt kuchlanishi formulasi berilgan javobni ko’rsating. A) U=A|q B) F=kq/r^2 C) I=q/t D) E=U/d 19 / 25 Elektr zanjirda tokni rostlash uchun qo’llaniladigan turli qarshilikli elektr asbobi qanday nomlanadi ? A) elektrometr B) elektroskop C) potensiyometr D) rezistor 20 / 25 Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng? A) 1,5 V B) 5V C) 220 V D) 500 kV 21 / 25 Tok kuchi formulasi keltirilgan javobni aniqlang? A) U=A/q B) I=q/t C) R=U/I D) Q=ItU 22 / 25 Elektr zanjirlaridagi Lampochkadan 0,2 A tok o’moqda lampochka speraliorqali 1 minutda nechakulon zaryad o’tadi ? A) 24 C B) 10 C C) 12 C D) 15 C 23 / 25 Elektr zanjiridagi lampochkada parallel ulangan voltmeter 1,5 V ni ko’rsatmoqda. Lampochkadan 10 c zaryad o’tganda qancha ish bajariladi A) 220 J B) 20 J C) 15 J D) 155 J 24 / 25 Elekt kuchlanishining ulchov birligi nima? A) Kulon B) Volt C) Sekund D) Amper 25 / 25 Rezistor uchlaridagi kuchlanish 9 V ga teng . Unda 0,5 A tok utishi uchun uning qarshiligi qancha bo’lishi kerak ? A) 20 Ω B) 18 Ω C) 44.4 Ω D) 44 Ω 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
