Registan Mirzo Ulug’bek [phone]

Registan Mirzo Ulug’bek [phone]

Fizika
1. “Registon,, o’quv markaziga o’zgarmas 220V kuchlanishda tok kelib turibdi. Agar ushbu linyadan Meros to’yxonasiga xam tok o’tqazmoqchi bo’lsak kuchlanish qanday o’zgaradi A) 55V B) 110V C) 220V D) 0 V


2. Qiyaligi bo'lgan qiya tekislikda sirpanib tushayotgan jismning tezlanishi 7,7 m/ bo’ishi uchun qanday bo’lishi kerak 0)
A) 45° B) 60° C) 30° D) 37


3. O’zgarmas 20 m/s tezlik bilan ketayotgan, massasi 10 kg bo’lgan jismning tezligini 30 m/s ga chiqarish uchun unga nechi joul energiya berish kerak ? A) 4000 B) 6000 C) 8000 D) 3500


4. Kattaliklari 12F va 4F bo’lgan vektorning natijaviy qiymati necha F ga teng bo’lishi mumkin? A) 0 B) 1 C) 2 D) 5


5. Induksiyasi 3 T bo’lgan magnit maydonga perpendikulyar ravishta 1,5 m/s tezlik bilan kirgan protonning tezlanishini aniqlang (m/ ) Protonning zaryadining uning massasiga nisbati C/kg A) 600 B) 500 C) 450 D) 1200


6. Quydagi zanjirda qarshiliklari ; =4kOm agar tok o’tayotgan bo’lsa zanjirdagi umumiy tok kuchini toping (mA )

A) 12 B) 36 C) 32 D) 24


7. Agaer EYUKi =12 V bo’lgan manbaga qarshiligi R=3 Om bo’lgan resistor ulansa zanjirdagi tok kuchi I=2 A ga teng bo’ldi. Tok manbaining qisqa tutashuv toki necha amperga teng bo’ladi? A) 6 B) 7 C) 5 D) 4


8. Tinch turgan zarraning zaryadi q ga teng. U 0,6c tezlik bilan xarakatlangandagi zaryadi qanday bo’ladi? c-yorug’lik tezligi. A) 5q/3 B) q C) 5q/4 D) 4q/5


9. Zanjirga ulangan ampermetrning ichki qarshiligi 0,12 Om va ampermetr shuntining qarshiligi 0,06 Om. Ampermetr 6 A tokni ko’rsatyotkan bo’lsa, zanjirdagi umumiy tok kuchi qanday bo’ladi? A) 16 A B) 12A C) 18 A D) 20 A


10. O’zgaruvchan tok zanjirida reaktiv qarshilik 4 Om aktiv qarshilik 5 Om effektiv tok kuchi 2 A Tokning o’rtacha quvvatini toping (W) A) 12,5 B) 20 C) 39 D) 24


11. Ancha baland nuqtadan gorizontal yo’nalishda υ₀=30 m/s tezlik bilan otilgan jism t=4 s vaqtdan keyin yerga qancha (m) yaqinlashadi
A) 170. B) 80. C) 105. D) 60.


12. simob toriy yadrolarini solishtiring ikkinchisining protonlari sonini birinchisining nuklonlari soniniga nisbatini toping A) 40/71 B) 9/8 C) 90/209 D) 10/29


13. q zaryatga ega bo’lgan shar sirtidagi potensial ga teng.Uning potensialini 5 gacha orttirish uchun sharga qanday zaryad qo’shish kerak?
A) 4q B) q C) 2q D) 3q


14. 0,2c tezlik bilan harakatlanayotgan zarraning impuls p ga teng. Uning tinch turgan kuzatuvchiga nisbatan massasi qanday? (c-yorug’lik tezligi)
A) 5p/c B) 4p/c C) p/c D) 2p/c


15. Fokus masofasi 10 sm bo’lgan yig’uvchi linzada buyimning tasfiri hosil qilinmoqda. Buyum linzadan 5 sm masofada turibdi Agar buyimni linzadan 10 sm ga uzoqlashtirsak uning tasfiri qanchaga (sm) siljiydi
A) 35 B) 40 C) 25 D) 20