Uy » Choraklik online testlar » Fizika choraklik » 7-sinf Fizika 4-chorak Fizika choraklik 7-sinf Fizika 4-chorak InfoMaster Aprel 26, 2021 1020 Ko'rishlar 0 SaqlashSaqlanganOlib tashlandi 1 0 Tomonidan yaratilgan InfoMaster 7-sinf Fizika 4-chorak Testni Vafaqulov Alisher tayyorladi. 1 / 25 60 N kuch jismga 0,6 m/s2 tezlanish beradi. Qanday kuch bu jismga 2 m/s2 tezlanish beradi? A) 180 N B) 250 N C) 200 N D) 150 N 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) 2 B) 3 C) 1 D) 4 3 / 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) 2 C) 3 D) 1 4 / 25 Vaznsiz ko’zg’almas blok orqali o’tkazilgan vaznsiz cho’zilmas ipga massalari 6 va 4 kg bo’lgan ikki yuk osilgan. Ishqalanish yo’q. Agar bu sistema o’ziga qo’yib berilsa, yuklar qanday tezlanish (m/s2) bilan xarakat qiladi? A) 4 B) 3 C) 2 D) 1 5 / 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) 3 B) 2 C) 4 D) 1 6 / 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) 50 B) 2000 C) 1786 D) 2800 7 / 25 Jismning bir marta to’liq aylanib chiqishi uchun ketgan vaqt aylanishi …… deyiladi A) tezlanishi B) tezligi C) davri D) chastotasi 8 / 25 Aylanma tekis harakatda aylanish davri va chastotasi bog’lanishi formulasini ko’rsating A) T=1/v B) T=t/N C) t=T*N D) T=2¶R/V 9 / 25 Aylanma tekis harakatdagi chiziqli tezlik formulasini ko’rsating. 1) V=2¶R/T, 2) V=wR, 3)V=2¶RV A) 1 B) 1,2,3 C) 3 D) 2 10 / 25 Aylana bo’ylab tekis harakatda markazga intilma tezlanish formulasini ko’rsating. 1) a=v2/R, 2) a=v2/2R, 3) a=v/t A) 1,2 B) 2 C) 1 D) 3 11 / 25 Soatning vaqt mili burchakli tezligini toping. (rad/s) A) π/10 B) π/1800 C) π/2600 D) π/30 12 / 25 Soatning 30 mm uzunlikdagi minut mili uchi 10 minutda 31,4 mm uzunlikdagi yo’lni bosib o’tdi. Minut mili uchining chiziqli tezligini toping A) 0,5 m/s B) 0,005 m/s C) 0,0005 m/s D) 0,00005 m/s 13 / 25 Soatning minut mili burchakli tezligini toping A) π/1800 B) π/30 C) π/2600 D) π/10 14 / 25 Aylanma tekis harakatda tezlanish qanday yo’nalgan? A) radius bo’ylab markazdan B) xar xil yo’nalgan bo’lishi mumkin C) radius bo’ylab markazga D) urinma bo’ylab 15 / 25 Gravitatsion doimiy xalqaro birliklar sistemasida qanday birlik bilan aniqlanadi A) m³/kg*s² B) kg*m/S² C) N*kg D) N/m² 16 / 25 Erkin tushish tezlanishi jismning yer sirtidan balandligiga bog’likligi qaysi formulada ko’rsatilgan A) g/m² B) f/m C) m/s² D) g=GM/(R+h)² 17 / 25 Yer sirtidagi h=2R balandlikda erkin tushish tezlanishi nimaga teng A) g/9 B) g C) g/4 D) g/2 18 / 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/4 B) F/16 C) F/9 D) F/2 19 / 25 Jismning yerga tortilish kuchi …… deb ataladi A) bosim kuchi B) reaksiya kuchi C) jism og’irligi D) og’irlik kuchi 20 / 25 Tezlanishning o’lchov birligini ko’rsating A) m/s B) m²/s C) s/ m² D) m/s² 21 / 25 Jism yerdan 35 m/s tezlik bilan tik yuqoriga otildi. U yerga necha sekunddan so’ng tushadi? A) 5 B) 7 C) 9 D) 3 22 / 25 Tekis tezlanuvchan harakatda tezlik va tezlanish ishoralarning munosabatini ko’rsating. 1) υ0 > 0, a>0 2) υ0 > 0, a<0 3) υ0 < 0, a<0 4) υ0<0, a>0 A) 1,2 B) 1,3 C) 3,4 D) 2,4 23 / 25 Erkin tushib harakat qilayotgan jismning tezligi har sekundda qanchaga o’zgaradi A) 5 m/s B) o’zgarmaydi C) 15 m/s D) 10 m/s 24 / 25 Tezlanish formulasi qanday ifodalanadi A) p = F / S B) a = (v - v˳)/t C) p = m / v D) S = at² / 2 25 / 25 Joyidan qo’zg’algan jism 0,3 m/s2 tezlanish bilan harakat qilib, qancha vaqtda 9 m/s tezlikka erishadi? A) 30 s B) 15 s C) 25 s D) 20 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