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. Moddiy nuqta tezligining vaqt bo‘yicha o‘zgarish qonuni υ=4t (m/s) ko‘rinishga ega. Uning 5-sekundda o‘tgan yo‘li qanday (m)?

2 / 40

2. FIK i 80% va motorining quvvati 1,5 kW bo’lgan kran 0,1 m/s o’zgarmas tezlik bilan qancha (t) massali yukni ko’tara oladi? g=10 m/s².

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3. A mashinaning tezligi 20 m/s, B mashinaning tezligi 30 m/s va ular to`g`ri yo`lda bir xil yo`nalishda harakatlanib ketishmoqda. A mashinaning B mashinaga nisbatan tezligini toping.

4 / 40

4. Massasi 0,18 g va moddasining zichligi 1800 kg/m³ bo’lgan musbat zaryadlangan sharcha zichligi 900 kg/m³ bo’lgan suyuq dielektrikda muallaq holatda turibdi. Dielelektrikdagi bir jinsli elektr maydonning kuchlanganligi 45 kV/m bo’lib, yuqoriga vertikal yo’nalgan. Sharchaning zaryadini (nC) toping.

5 / 40

5. Silindr yon sirti yuzi 24π ga, hajmi 48π ga teng. Silindrning balandligini toping.

6 / 40

6. Agar shaxta tubida barometr 85 sm sim.ust.ni, yer sirtida 78 sm sim.ust.ni ko’rsatsa shaxtaning chuqurligini aniqlang. (m)

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7. “Neksiya” avtomobili 15 sekundda tezligini 108 km/h gacha yetkazdi. Avtomobilning tezlanishi qanday (m/s²).

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8. 4 valentli kremniyga birinchi holatda 3 valentli indiy, ikkinchi holatda 5 valentli mishyak qo‘shildi. Bu ikki holatda aralashma qanday o‘tkazuvchanlikka ega bo‘ladi?

9 / 40

9. K va N nuqtalar orasidagi potensiallar farqi 25V bo‘lsa, L va N nuqtalar orasidagi kuchlanish qancha (V)?

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10. Moddiy nuqta 2 minutda 600 marta tebranadi. Tebranish davrini aniqlang.

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11. Katodga 3 s davomida kelgan ionlaming umumiy zaryadi 9 С bo’lsa, elektrolit eritmasidan o‘tib turgan o‘zgarmas tokning kuchi necha amper boladi?

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12. 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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13. 2 kg va 1 kg massali silindrlar qo`zg`almas blok orqali vaznsiz ipga osilgan. Bunda birinchi silindrning 4% qismi suvga botganda muvozanat vujudga kelgan. Silindrlarning zichligini (kg/m3 ) aniqlang.

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

15 / 40

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

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16. 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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17. Tebranish konturida tok kuchi maksimal qiyrnatga yetganida ....

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18. 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?

19 / 40

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

20 / 40

20. 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?

21 / 40

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

22 / 40

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

23 / 40

23. 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)?

24 / 40

24. O‘lchamlari 4 ·6 m2 bo‘lgan tomga normal atmosfera bosimida havo qanday kuch (kN) bilan bosishini hisoblang? Normal sharoitda atmosfera bosimi 101308 Pa deb hisoblansin.

25 / 40

25. 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?

26 / 40

26. 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.

27 / 40

27. 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)?

28 / 40

28. 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.

29 / 40

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

30 / 40

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. Induksiya EYUK ning birligini ko‘rsating.

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32. Atom bombalarining quvvati istalgancha katta bo’la olmasligining sababi nimada?

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33. Agar boshlang’ich tezlikka ega bo’lmagan elektron yassi kondensatorda bir plastinkadan ikkinchisigacha bo’lgan yo’lni o’tganda 109 sm/s tezlikga erishganligi ma’lum bo’lsa, kondensator plastinkalaridagi zaryadning sirt zichligini aniqlang(nC/m2). Plastinkalar orasidagi masofa 3 sm. εo=8.85·10-12 F/m, e=-1.6·10-19 C, me=9.1·10-31 kg.

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34. Katodga 4 s davomida kelgan ionlarning umumiy zaryadi 16 С bo’lsa, elektrolit eritmasidan o‘tib turgan o‘zgarmas tokning kuchi necha amper boladi?

35 / 40

35.
 

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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36. 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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37. Harakatsiz turgan jismning zichligi 840 kg/m3 ga teng. Jism inersial sanoq sistemasiga nisbatan 0,4 c tezlik bilan harakatlansa, bu sanoq sistemasida jismning zichligi qanday qiymatga (g/sm3 ) ega bo`ladi?

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38. O‘zgarmas kuchlanish manbayiga 10 Ω , 16 Ω va 18 Ω qarshiliklar ketma-ket ulangan. Umumiy qarshilikni toping (Ω).

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

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40. 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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