Fizika attestatsiya №12

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OMAD YOR BO'LSIN!

Fizika fanidan attestatsiya savollari №12

Testni Toshev Anvar tayyorladi.

DIQQAT! Endi siz o'z bilmingizni sinab ko'rish bilan birga  sertifikatga ham ega bo'lishingiz mumkin.

Sertifikat olish uchun barcha ma'lumotlarni to'g'ri kriting! 

Testda 76% va undan yuqori natija oling va sertifikatni yuklab oling.

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1. Gorizontal tekislikdagi uchburchakli pona ?1 = √3 m/stezlik bilan gorizontal ravishda tekis siljitilmoqda (rasmga qarang). Bunda vertikal turgan AB sterjen qanday v2 tezlik bilan ishqalanishsiz ko'tariladi (m/s)? a=30°

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2. Mexanika bo’limidagi SI sistemaga kirgan asosiy birliklarni ko’rsating.

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3. Quyidagi kattaliklardan qaysi biri o`zgarsa ham yassi kondensatorning sig`imi o`zgarmaydi?

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4. O’ta gigant Antares yulduzining massasi Quyosh massasidan 50 marta diametri esa 5 marta katta bo’lsa, Antares yulduzi sirtidan uning radiusi balandlikdagi erkin tushush tezlanishini (m/s²) toping? Quyosh sirtidagi erkin tushshush tezlanishi 50 m/s² ga teng deb hisoblang.

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5. Miqdori 12 mol bo’lgan argon gazi 12°C dan -88°C gacha sovutilganda, uning ichki energiyasi qanday o’zgaradi?

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6. Boshlang’ich tezliksiz 4 m/s² tezlanish bilan tekis tezlanuvchan harakatlanishni boshlagan nexia avtomashinasining 4- va 3- sekundlargi bosib o’tgan yo’llar nisbatini toping?

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7. G‘ildirak ω= 100πt rad/s burchak tezlik bilan aylanyapti. U 10 s da necha marta aylanadi?

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8. Quyida jismning Ox o‘qidagi harakatining tezlik grafigi berilgan. Jismning dastlabki 8 sekund davomidagi yo‘li S ni (m) va ko‘chishi L ni (m) aniqlang.

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9. I=5A, ampermetr 4A ni ko‘rsatmoqda. Rezistor qarshiligi ampermetr qarshiligidan necha marta katta?

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10. Sig`imi 6·10⁻⁹ F bo`lgan kondensatorga 20 nC elektr zaryadi berildi. Agar unga sig`imi 18·10⁻⁹  F bo`lgan zaryadsiz kondensator parallel ulansa birinchi kondensatorning qoplamalari orasidagi potensiallar farqi qanday o`zgaradi?

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11. Antennadagi o'zgaruvchan tokning tenglamasi I = 2•cos 125,6·107 t  (A) ko'rinishga ega. Antenna nurlatayotgan elektromagnit to'lqinning tebranish davrini toping

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12. Tebranish konturida tok kuchi maksimal qiyrnatga yetganida ....

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13. 45 m balandlikdan erkin tashlab yuborilgan metall sharcha yerga elastik urilib, 5 m balandlikka ko’tarildi. Yerga urilish  vaqtidagi sharcha impulsining o’zgarishini toping (kg·m/s). (m=5 kg). g=10m/s2.

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14. Jismga 10 N va 20 N kuchlar o‘zaro 120° burchak ostida ta’sir etmoqda. Bu kuchlarning teng ta’sir etuvchisini toping (N).

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15. Induktivligi L, sig’imi C bo’lgan tebranish konturida so’nmas elektromagnit tebranishlar hosil bo’lmoqda. Agar kondensator qoplamalarida maksimal kuchlanish Umax bo’lsa, tok kuchining maksimal qiymati qanday bo’ladi?

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16. Elektr zanjir qarshiligi 4 Ω bo‘lgan rezistor EYUKi 12 V, ichki qarshiligi 2 Ω bo‘lgan tok manbayidan  iborat. Rezistorning kuchlanishi qanday?

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17. Kislorod atomini ionlashtirish uchun 14 eVga yaqin energiya zarur. Ionlashtiruvchi nurlanishning chastotasini toping. h = 6,63·10-34 J·s, c=3·108 m/s, e = 1,6·10-19 C

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18. Og‘irlik deb ...

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19. Traktor birinchi 5 minutda 600 m yo’l o’tdi. U shu tezlik bilan harakatlanib 0,5 soatda qancha yo’l o’tadi.

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20. Radioaktiv elementning aktivligi 8 kunda 4 marta kamaydi. Yarim yemirilish davrini toping.

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21. 10 sm uzunlikdagi o`tkazgich induksiyasi 50 mTl bo`lgan magnit maydon kuch chiziqlariga tik joylashgan. Amper kuchi o`tkazgichni o`zining yo`nalishida 8 sm siljitib, 0,004 J ish bajaradi. O`tkazgichdagi tok kuchi (A) qanday?

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22. Agar 10,8 kg massali kubning qirrasi uch marta qisqartirilsa, uning massasi (g) qancha bo'ladi?

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23. Kuchni 3 marta orttirib, yelkani 2 marta kamaytirsak, kuch momenti qanday o’zgaradi?

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24. Elektr plita tuzatilayotganda uning spirali dastlabki uzunligining 0,2 ulushiga qisqartirildi. Bu holda plitaning quvvati necha marta ortadi?

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25. Agar jismga 3 s davomida 15 N kuch ta’sir etsa, jism impulsining o'zgarishi (kg·m/s) nimaga teng?

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26. α – zarraning tezligi 0 dan v=0,9 c gacha orttirilganda, uning massasi qanchaga ortadi? α-zarraning tinchlikdagi massasi m0=4,0 m.a.b. deb hisoblang. c=3·108 m/s.

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27. C sig`imli kondensator q zaryad bilan, 2C sig`imli kondensator 3q zaryad bilan zaryadlangan. Bu kondensatorlar qutblarini teskari holda ulansa sistema elektr energiyasi qanchaga kamayadi?

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28. Fotoeffekt uchun Eynshteyn tenglamasi shu hodisa uchun qaysi qonunning qo‘llanishidir?

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29.
 

Tebranish konturidagi kondensator qoplamalaridagi zaryad vaqt o’tishi bilan q=10-9 sin108 πt qonun bo’yicha o’zgaradi. Konturdagi tok kuchining vaqtga bog’liqlik qonunini yozing.

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30. Difraksion panjaraga monoxromatik yorug`lik nuri tik tushmoqda. Panjaraning 1 mm da 100 ta shtrix bor. Ekrandagi birinchi tartibli ikkita maksimum orasidagi masofa 10 sm ga teng bo`ldi. Ekran bilan difraksiya panjarasi orasidagi masofa 1 m bo`lsa, yorug`likning to`lqin uzunligini ( μm) toping.

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31. Barcha moddalar o‘z magnit xossalariga ko‘ra diamagnetik, paramagnetik va ferromagnetiklarga bo‘linadi. Magnit singdiruvchanligi 1 dan biroz katta bo‘lgan moddalar qaysi turga mansub?

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32. Matematik mayatning uzunligi 2,5 m, unga osilgan  sharchaning massasi 100 gr. Tebranish davrini hisoblang(s). g=10m/s2.

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33. Tomonlari 20 sm va 30 sm bo‘lgan to‘g‘ri to‘rtburchak shaklidagi ramkadan 40 A tok o‘tmoqda. Ramkaning magnit momenti nimaga teng ( A·m2)?

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34. Kislorod atomining ionizatsiya energiyasi 14 eV. Bu atom uchun fotoeffektning qizil chegarasi (nm) topilsin. h=6,63·10-34 J s, 1 eV= 1,6·10-19 J.

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35. Lift shiftidagi dinamometrga osilgan m  massali yuk vertikal bo`ylab a  tezlanish bilan pastga harakat qilmoqda. Agar dinamometr prujinasining bikrligi k  bo`lsa, bu prujina qanchaga uzayadi?

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36. Tebranish konturidagi kondensator qoplamalari orasidan nisbiy dielektrik singdiruvchanligi 4 ga teng bo'lgan modda chiqarib olinsa, zanjirdagi zaryadning tebranish davri qanday o'zgaradi?

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37. Kunduzgi yorug'likda material qizil rangda ko'rindi. Agar qorong'ida shu materialga havorang nur tushirilsa, u qaysi rangda ko'rinadi?

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38. Atom E2 energiyali holatdan E1 energiyali holatga o'tganida nurlangan fotonning energiyasi qanday bo’ladi?

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39. Yerning massasi 6,0 ·1024 kg, Oyning massasi 7,35 · 1022 kg, ularning markazlari orasidagi masofa 384400 km. Yer bilan Oy orasidagi tortishish kuchi topilsin (N).

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40. Uzunligi 10 sm bo‘lgan prujinaga 0,4 kg massali yuk osilganida u 1 sm ga uzaydi. Prujinaning bikrligini aniqlang (N/m).

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