Uy » Choraklik online testlar » Fizika choraklik » 7-sinf Fizika 4-chorak Fizika choraklik 7-sinf Fizika 4-chorak InfoMaster Aprel 26, 2021 1124 Ko'rishlar 0 SaqlashSaqlanganOlib tashlandi 1 3 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 tinch turganda kuchlar orasidagi munosabatni ko’rsating 1) mg > N 2) mg < N 3) mg = N 4) mg = 0; N = 0 A) 4 B) 3 C) 2 D) 1 2 / 25 Suv quyilgan idish lift kabinasiga joylashtirilgan. Agar lift tezlanish bilan yuqoriga harakatlansa, suvning idish tubiga bosimi qanday o’zgaradi? A) Ortishi xam, kamayishi xam mumkin B) O’zgarmaydi C) Ortadi D) Kamayadi 3 / 25 Massasi 60 kg bo’lgan jism tik yuqoriga 1 m /s2 tezlanish bilan ko’tarilayotgan bo’lsa, uning og’irligi qanday bo’ladi? A) 600 N B) 480 N C) 660 N D) 540 N 4 / 25 Faqat butun olam tortishish kuchlari ta’sirida erkin harakat qilayotgan xar qanday jism ......... xolatida bo’ladi A) vaznsizlik B) turg’unmas muvozanat C) turg’un muvozanat D) o’ta yuklanish 5 / 25 Liftdagi odam o’ta yuklanishga duch kelishi mumkinmi? A) Yo’q B) Xa lift yuqoriga ko’tarilganda C) Xa lift tezlanish bilan pastga tushganda D) Xa agar lift tezlanish bilan yuqoriga ko’tarilsa 6 / 25 Raketa quyosh sistemasini tark etishi uchun u yerdan 16,7 km/s tezlik bilan uchirilishi kerak. Bu tezlikni nomi A) 3-kosmik tezlik B) 1-kosmik tezlik C) 2-kosmik tezlik D) notekis tezlik 7 / 25 Oyning yer atrofida aylanish tezligi nimaga teng A) 40 km/s B) 1 km/s C) 30 km/s D) 10 km/s 8 / 25 Oyda erkin tushish tezlanishi nimaga teng? (m/s2) A) 1,6 B) 1 C) 7,9 D) 9,8 9 / 25 Yer sirtidagi h=2R balandlikda erkin tushish tezlanishi nimaga teng A) g/4 B) g/9 C) g D) g/2 10 / 25 Erkin tushish tezlanishi jismning yer sirtidan balandligiga bog’likligi qaysi formulada ko’rsatilgan A) f/m B) g/m² C) m/s² D) g=GM/(R+h)² 11 / 25 Yerning quyosh atrofida aylanish tezligi nimaga teng A) 10 km/s B) 1 km/s C) 30 km/s D) 40 km/s 12 / 25 Aylanma tekis harakatda chiziqli tezlik bilan burchak tezlik orasidagi munosabat formulasini ko’rsating A) w=2¶V B) w=2¶/T C) w=4/t D) V=wR 13 / 25 Agar moddiy nuqta aylana bo’ylab teng vaqtlar orasida teng yollarni bosib o’tsa, bunday harakat ....... harakat deyiladi A) tekis B) aylanma o’zgaruvchan C) notekis D) tekis aylanma tezlik 14 / 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) 2800 B) 2000 C) 1786 D) 50 15 / 25 Aylanma tekis harakatdagi chiziqli tezlik formulasini ko’rsating. 1) V=2¶R/T, 2) V=wR, 3)V=2¶RV A) 1,2,3 B) 3 C) 2 D) 1 16 / 25 Soatning vaqt mili burchakli tezligini toping. (rad/s) A) π/1800 B) π/10 C) π/2600 D) π/30 17 / 25 Aylanish davri bilan chiziqli tezligi orasidagi munosabat formulasini toping. A) V=at B) V=2¶R/T C) V=S/t D) V=wR 18 / 25 Soatning 30 mm uzunlikdagi minut uchi 10 minutda 31,4 mm uzunlikdagi yo’lni bosib o’tdi. Minut mili uchining burchak tezligini toping. A) 1,7 rad/s B) 0,17 rad/s C) 0,017 rad/s D) 0,0017 rad/s 19 / 25 Soatning minut mili aylanishining chastotasini toping.(Hz) A) 1/100 B) 1/7200 C) 100 D) 1/3600 20 / 25 Velosiped g’ildiragining o’qidan eng uzoq nuqtasi 0,02 s davomida 20 km yo’lni bosib o’tdi. Velosipedning tezligini toping A) 36 km/soat B) 4 km/soat C) 0,36 km/soat D) 3,6 km/soat 21 / 25 Aylanma tekis harakatga chiziqli tezlik va burchakli tezlik bog’lanish formulasini ko’rsating A) υ=2pR/T B) ω=2p/T C) υ=ωR D) ω=2p υ 22 / 25 Tekis sekinlanuvchan harakatda tezlik va tezlanish ishoralarining munosabatini ko’rsating. 1) υ0 > 0, a<0 2) υ0 = 0, a<0 3) υ0 < 0, a>0 4) υ >0, a>0 A) 2,3 B) 4 C) 3,4 D) 1,3 23 / 25 Joyidan qo’zg’algan jism 0,2 m/s2 tezlanish bilan harakatlanganda 1 minutda u qanday tezlikka erishadi A) 0,12 m/s B) 120 m/s C) 1,2 m/s D) 12 m/s 24 / 25 Tezligi υ=5-3 t (m/s) tenglama bilan berilgan jismning boshlangich tezligi (m/s) nimaga teng? A) 4 B) 3 C) 2 D) 5 25 / 25 Jism harakat tenglamasi x=5+3t–t2 formula bilan berilgan. Jismning boshlang’ich koordinatasi nimaga teng? A) 3 m B) 5 m C) 1 m D) 9 m 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