Uy » Choraklik online testlar » Fizika choraklik » 7-sinf Fizika 4-chorak Fizika choraklik 7-sinf Fizika 4-chorak InfoMaster Aprel 26, 2021 1048 Ko'rishlar 0 SaqlashSaqlanganOlib tashlandi 1 0 Tomonidan yaratilgan InfoMaster 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 25 Faqat butun olam tortishish kuchlari ta’sirida erkin harakat qilayotgan xar qanday jism ......... xolatida bo’ladi A) o’ta yuklanish B) vaznsizlik C) turg’un muvozanat D) turg’unmas muvozanat 2 / 25 Yer sirtidagi h=2R balandlikda erkin tushish tezlanishi nimaga teng A) g/2 B) g/9 C) g D) g/4 3 / 25 Oyning yer atrofida aylanish tezligi nimaga teng A) 30 km/s B) 1 km/s C) 10 km/s D) 40 km/s 4 / 25 Jismning yerga tortilish kuchi …… deb ataladi A) og’irlik kuchi B) bosim kuchi C) jism og’irligi D) reaksiya kuchi 5 / 25 Yer uchun birinchi kosmik tezlik qiymatini ko’rsating A) 16,7 km/s B) 7,9 m/s C) 7,9 km/s D) 11,2 km/s 6 / 25 Yer uchun uchunchi kosmik tezlik qiymatini ko’rsating A) 7,9 m/s B) 7,9 km/s C) 16,7 km/s D) 11,2 km/s 7 / 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) 2 B) 1 C) 3 D) 4 8 / 25 Nyutonning 3 qonuni formulasi qaysi ifodada to’g’ri ko’rsatilgan? A) F1 =- F2 B) F = - k x C) F = mg D) F = mv²/ R 9 / 25 Massasi 4 kg bo’lgan jism biror kuch ta’siri ostida 2 m/s2 tezlanish oldi. Shunday kuch ta’siri ostida massasi 10 kg bo’lgan jism qanday tezlanish oladi? A) 0,8 m/s² B) 2 m/s² C) 0 D) 1 m/s² 10 / 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) 2 m/s² B) 1 m/s² C) 0 D) 0,5 m/s² 11 / 25 60 N kuch jismga 0,8 m/s2 tezlanish beradi. Qanday kuch bu jismga 2 m/s2 tezlanish beradi? A) 15 N B) 24 N C) 240 N D) 150 N 12 / 25 Xalqaro birliklar sistemasida kuch birligi A) kg / s² B) kg*m²/s² C) m / s² D) kg*m / s² 13 / 25 Qaysi shart bajarilganda, jism suyuqlikda tekis cho’ka boshlaydi? (mg-og’irlik kuchi, Fa- Arximed kuchi, F-qarshilik kuchi) 1) m g > F = F a 2) m g = F 3) m g = F = F a 4) mg < F = F a A) 4 B) 1 C) 3 D) 2 14 / 25 Nyutonning 2-qonuni formulasini ko’rsating A) a = 2s/ t² B) a = v² /R C) a = v/t D) a = F / m 15 / 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) 1,3 B) 4 C) 3,4 D) 2,3 16 / 25 Tezlanish formulasi qanday ifodalanadi A) a = (v - v˳)/t B) S = at² / 2 C) p = F / S D) p = m / v 17 / 25 Jismning vaqt birligi ichida to’liq aylanishlari soni aylanishi ….. deb ataladi A) tezlanishi B) chastotasi C) davri D) tezligi 18 / 25 Markazga intilma tezlanish formulasi qaysi ifodada to'g'ri ko’rsatilgan? A) a=v²/R B) a=(v-v˳)/t C) a=v/t D) a=F/m 19 / 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 20 / 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) 2000 D) 50 21 / 25 Burchakli ko’chishning vaqtga nisbati qanday fizik kattalik? A) tezlanish B) burchakli tezlik C) chastota D) davr 22 / 25 Soatning vaqt mili burchakli tezligini toping. (rad/s) A) π/1800 B) π/30 C) π/2600 D) π/10 23 / 25 Soatning minut mili aylanishining chastotasini toping.(Hz) A) 1/7200 B) 1/100 C) 1/3600 D) 100 24 / 25 Avtomabil 200 m radiusli aylana yo’lda 72 km/soat tezlik bilan harakatlanadi. Uning markaziga intilma tezlanishi qancha m/s2 ga teng? A) 4 B) 3 C) 5 D) 2 25 / 25 Aylanma tekis harakatda tezlanish qanday yo’nalgan? A) radius bo’ylab markazdan B) radius bo’ylab markazga C) urinma bo’ylab D) xar xil yo’nalgan bo’lishi mumkin 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