Uy » Choraklik online testlar » Fizika choraklik » 7-sinf Fizika 4-chorak Fizika choraklik 7-sinf Fizika 4-chorak InfoMaster Aprel 26, 2021 946 Ko'rishlar 0 SaqlashSaqlanganOlib tashlandi 1 0 Tomonidan yaratilgan InfoMaster 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 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) 5 B) 2 C) 3 D) 4 2 / 25 Velosiped g’ildiragining o’qidan eng uzoq nuqtasi 0,02 s davomida 20 km yo’lni bosib o’tdi. Velosipedning tezligini toping A) 3,6 km/soat B) 4 km/soat C) 0,36 km/soat D) 36 km/soat 3 / 25 Soatning 30 mm uzunlikdagi minut uchi 10 minutda 31,4 mm uzunlikdagi yo’lni bosib o’tdi. Minut mili uchining burilish burchagini toping. (rad) A) 5 rad B) 1,05 rad C) 4 rad D) 3 rad 4 / 25 Aylanma tekis harakatga chiziqli tezlik va burchakli tezlik bog’lanish formulasini ko’rsating A) ω=2p υ B) υ=2pR/T C) υ=ωR D) ω=2p/T 5 / 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) 1786 C) 2000 D) 50 6 / 25 Soatning minut mili aylanishining chastotasini toping.(Hz) A) 1/100 B) 1/7200 C) 100 D) 1/3600 7 / 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) 660 N B) 540 N C) 600 N D) 480 N 8 / 25 Tennischi 100 kg massali koptokni 250 N kuch bilan urganda koptok 50 m/s tezlik oldi. Zarb necha sekund davom etgan? A) 100 B) 20 C) 10 D) 50 9 / 25 Odam liftda turibdi. Odamga ta’sir qiluvchi kuchlar: mg – og’irlik kuchi, N – tayanch reaksiya kuchi, Lift tekis xarakatlanganda kuchlar orasidagi munosabatni ko’rsating. Lift yuqoriga xarakatlana boshlaydi 1) mg > N 2) mg < N 3) mg = N 4) mg = 0; N = 0 A) 1 B) 4 C) 3 D) 2 10 / 25 1000 mN necha N? A) 10 B) 400 C) 1 D) 70 11 / 25 Suv quyilgan idish lift kabinasiga joylashtirilgan. Agar lift tezlanish bilan yuqoriga harakatlansa, suvning idish tubiga bosimi qanday o’zgaradi? A) Ortadi B) Kamayadi C) Ortishi xam, kamayishi xam mumkin D) O’zgarmaydi 12 / 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) 0,5 m/s² B) 1 m/s² C) 0 D) 2 m/s² 13 / 25 Massasi 0,5 kg bo’lgan koptokka 0,02 s davomida zarb berilgandan keyin u 10 m / s tezlik oladi. Zarbning o’rtacha kuchini toping A) 200 N B) 500 N C) 250 N D) 1000 N 14 / 25 Jism 20 m/s tezlik bilan tik yuqoriga otildi. Jism necha sekund eng baland nuqtasigacha ko’tariladi? g = 10 m/s2 A) 2 c B) 1 c C) 4 c D) 3 c 15 / 25 Jism harakat tenglamasi x=5+3t–t2 formula bilan berilgan. Jismning boshlang’ich koordinatasi nimaga teng? A) 5 m B) 3 m C) 9 m D) 1 m 16 / 25 Jism tezlik proporsiyasining vaqtga bog’lanish v = 3+2t (m/s) ko’rinishga ega. Ko’chish proyeksiyasining vaqtga bog’lanishi qanday? A) S = 3t + 1 t² B) S = 3t + 2 t² C) S = 2t + 3 ² D) S = 2t² 17 / 25 Erkin tushayotgan jism ikkinchi sekundda qanday masofani (m) o’tadi? A) 5 B) 15 C) 25 D) 35 18 / 25 m/s2 tezlanish bilan to’g’ri chiziq bo’ylab harakatlanayotgan jismning holatidan boshlab birinchi sekunda qanday masofani (m) o’tadi? A) 6 B) 8 C) 7 D) 4 19 / 25 Tezlanishning o’lchov birligini ko’rsating A) m/s B) m/s² C) s/ m² D) m²/s 20 / 25 Avtomobil 5 m/s2 tezlanish bilan tinch holatdan harakat boshladi. U 4s da necha metr yo’l o’tadi? A) 10 B) 40 C) 20 D) 30 21 / 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) 4 B) 3,4 C) 2,3 D) 1,3 22 / 25 Ikki jism bir biriga F kuchi bilan tortilmoqda. Agar birining massasi n marta kamaytirilsa ular qanday kuch bilan tortiladi A) F/n B) F*n C) F(n-1) D) F(n+1) 23 / 25 Yerning tortishish kuchi ta’sirida jismning yer atrofida aylana bo’ylab, harakatlanishida erishtiradigan tezlik ………. deyiladi A) 1-kosmik tezlik B) 2-kosmik tezlik C) notekis tezlik D) 3-kosmik tezlik 24 / 25 Liftdagi odam o’ta yuklanishga duch kelishi mumkinmi? A) Xa agar lift tezlanish bilan yuqoriga ko’tarilsa B) Yo’q C) Xa lift yuqoriga ko’tarilganda D) Xa lift tezlanish bilan pastga tushganda 25 / 25 Yer uchun birinchi kosmik tezlik qiymatini ko’rsating A) 7,9 km/s B) 11,2 km/s C) 16,7 km/s D) 7,9 m/s 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