Uy » Choraklik online testlar » Fizika choraklik » 7-sinf Fizika 4-chorak Fizika choraklik 7-sinf Fizika 4-chorak InfoMaster Aprel 26, 2021 1013 Ko'rishlar 0 SaqlashSaqlanganOlib tashlandi 1 1 Tomonidan yaratilgan InfoMaster 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 25 Odam liftda turibdi. Odamga ta’sir qiluvchi kuchlar: mg – og’irlik kuchi, N – tayanch reaksiya kuchi, Lift pastda to’xtashdan oldin sekinlashganda kuchlar orasidagi munosabatni ko’rsating. Lift pastda to’xtashdan oldin sekinlashyapti 1) mg > N 2) mg < N 3) mg = N 4) mg = 0; N = 0 A) 4 B) 1 C) 2 D) 3 2 / 25 Odam liftda turibdi. Odamga ta’sir qiluvchi kuchlar: mg – og’irlik kuchi, N – tayanch reaksiya kuchi, Lift tinch turganda kuchlar orasidagi munosabatni ko’rsating 1) mg > N 2) mg < N 3) mg = N 4) mg = 0; N = 0 A) 1 B) 4 C) 2 D) 3 3 / 25 Agar reaktiv samolyot dvigatelining tortish kuchi 90 k N bo’lsa, massasi 60 t bo’lgan samolyot tezlik olish vaqtida qanday tezlanish bilan harakatlanadi? A) 0 B) 0,5 m/s² C) 2 m/s² D) 1 m/s² 4 / 25 Motosikl botiq ko’prik ustida tekis harakatlanmoqda. Ko’prikning eng quyi nuqtasiga yetganida unga qo’yilgan kuchlarning teng ta’sir etuvchisi qanday yo’nalgan bo’ladi? A) Orqaga B) Pastga C) Oldinga D) Yuqoriga 5 / 25 Odam liftda turibdi. Odamga ta’sir qiluvchi kuchlar: mg – og’irlik kuchi, N – tayanch reaksiya kuchi, Lift yuqoriga xarakatlana boshlaganda kuchlar orasidagi munosabatni ko’rsating. 1) mg > N 2) mg < N 3) mg = N 4) mg = 0; N = 0 A) 1 B) 3 C) 2 D) 4 6 / 25 Suv quyilgan idish lift kabinasiga joylashtirilgan. Agar lift tezlanish bilan yuqoriga harakatlansa, suvning idish tubiga bosimi qanday o’zgaradi? A) Ortadi B) Ortishi xam, kamayishi xam mumkin C) O’zgarmaydi D) Kamayadi 7 / 25 Nyutonning 2-qonuni formulasini ko’rsating A) a = F / m B) a = 2s/ t² C) a = v² /R D) a = v/t 8 / 25 Aylanish davri bilan chiziqli tezligi orasidagi munosabat formulasini toping. A) V=at B) V=2¶R/T C) V=wR D) V=S/t 9 / 25 Burchakli ko’chishning vaqtga nisbati qanday fizik kattalik? A) davr B) tezlanish C) burchakli tezlik D) chastota 10 / 25 Velosiped raridusi 25 m bo’lgan aylanma yo’lda 10 m/s tezlik bilan tekis harakatlanmoqda. Uning markazga intilma tezlanishini toping. (m/s²) A) 3 B) 2 C) 5 D) 4 11 / 25 Avtomabil 90 km/soat tezlik bilan tekis harakatlanmoqda. Agar avtomobil g’ildiragining raidusi 35 sm bo’lsa, g’ildirak markazidan shuncha masofa uzoqlikdagi nuqtasining markaziga intilma tezlanishini toping. (m/s2) A) 1786 B) 2800 C) 50 D) 2000 12 / 25 Aylanma tekis harakatdagi chiziqli tezlik formulasini ko’rsating. 1) V=2¶R/T, 2) V=wR, 3)V=2¶RV A) 3 B) 1,2,3 C) 1 D) 2 13 / 25 Soatning minut mili aylanishining chastotasini toping.(Hz) A) 1/3600 B) 100 C) 1/100 D) 1/7200 14 / 25 Erkin tushayotgan jism ikkinchi sekundda qanday masofani (m) o’tadi? A) 35 B) 25 C) 15 D) 5 15 / 25 Joyidan qo’zg’algan jism 0,3 m/s2 tezlanish bilan harakat qilib, qancha vaqtda 9 m/s tezlikka erishadi? A) 20 s B) 25 s C) 15 s D) 30 s 16 / 25 Jism tekis tezlanuvchan harakat boshlab, 3-sekundda 5 m yo’l o’tdi. U harakatning boshlang’ich 3 sekundida qanday yo’l o’tadi (m) ? A) 7 B) 11 C) 9 D) 13 17 / 25 25 m/s tezlik bilan yuqoriga tik otilgan jismning 2 s dan keyingi tezligi qancha bo’ladi? A) 20 m/s B) 15 m/s C) 5 m/s D) 10 m/s 18 / 25 Tekis tezlanuvchan harakat qilayotgan “Matiz” 10 s davomida tezligini 54 km / soat dan 100 km / soat ga oshirdi. «Matiz»ning tezlanishini toping A) 13 m/s² B) 2,5 m/s² C) 3 m/s² D) 15 m/s² 19 / 25 Tezligi υ=5-3 t (m/s) tenglama bilan berilgan jismning boshlangich tezligi (m/s) nimaga teng? A) 4 B) 5 C) 3 D) 2 20 / 25 Jismning harakat tenglamasi x = 2 – 3 t + 2 t2 formula bilan berilgan. Bu harakat uchun tezlik tenglamasini yozing A) υ= - 3 + 4 t B) υ = 4 t C) υ= 4 - 3 t D) υ= 4 + 3 t 21 / 25 Yerga tortilishi tufayli jismning tayanchga yoki osmaga tasr etadigan kuchi .......... deb ataladi A) jism og’irligi B) reaksiya kuchi C) bosim kuchi D) og’irlik kuchi 22 / 25 Lift a A) (P=mg) B) P=m(g-a) C) P=m(g+a) D) P=m(a-g) 23 / 25 Yer uchun uchunchi kosmik tezlik qiymatini ko’rsating A) 7,9 m/s B) 11,2 km/s C) 16,7 km/s D) 7,9 km/s 24 / 25 Yer sirtidagi jism yerga F kuch bilan tortilmoqda. Yer sirtidan h=2R balandlikka ko’tarilsa yerga qanday kuch bilan tortiladi? R-Ep radus A) F/2 B) F/9 C) F/16 D) F/4 25 / 25 Erkin tushish tezlanishi jismning yer sirtidan balandligiga bog’likligi qaysi formulada ko’rsatilgan A) g=GM/(R+h)² B) g/m² C) f/m D) m/s² 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