6 – 9, 10 fizika fanidan nazorat shakllari va ularni baholash mezonlari


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9. O’zgarmas tezlik bilan harakatlanayotgan avtomobilning quvvatini hisoblash formulasini belgilang .
A) N=A/t B) N=Fv C) N=At D) N=F/v
10. 0,1 kW∙soat necha Jga teng ?
A)103 B) 3,6 ∙106 C)3,6 ∙105D) 36∙106
11. Mashinaning foydali ish koyeffitsienti formulasi to’g’ri yozilgan javobni belgilang.
A) η= At - Af B) η= Af /At C) η= At /Af D) η= At +Af
12. Agar bola 10 minutda 1800 J ish bajarsa, uning foydali quvvati nimaga teng ?
A) 30 W B) 180 W C) 3 W D) 18 kW
13. Jismga ta’sir etuvchi kuch va jism ko’shishi orasidagi burchak necha gradus bo’lganda mexanik ish bajarilmaydi ?
A) 90 ̊ dan katta B) 90 ̊ dan kichik C) 180 ̊ D) 90 ̊
14. Gapni to’ldiring: “ 1 J – bu, 1 N kuch ta’sirida jismni .... masofaga ko’chirishda bajarilgan ishga teng. “
A) ...1 m .... B) ... ixtiyoriy... C) .... 1 km .... D) .... 1 sm ...
15. Ot aravani 1 km masofaga tortib borishda 220 kJ ish bajarildi. Ot aravani qanday kuch bilan tortgan ?
A) 22 N B) 220 kN C) 220 N D) 110 N
16. Jism yuqoridan pastga tushayotganda bajarilgan ish musbatmi, manfiy ? _________
17. Kinetik energiya hisobidan bajarilgan ish formulasini yozing __________________
18. Jism Yerdan tik yuqoriga otilganda uning qanday turdagi energiyasi kamayib
boradi ? _______________________________
19. “ Yopiq sistemaning to’liq mexanik energiyasi sistema qismlarining har qanday harakatida o’zgarmaydi.” Bu qonun qanday ataladi ? ____________________________
20. 1 s vaqt ichida 1 J ish bajaradigan qurilmaning quvvati qanchaga teng ? ______ W.
Javoblar:
















1

B

8

B

15

C

2

A

9

B

16

Musbat

3

D

10

C

17

A=mv22/2- mv12/2

4

A

11

B

18

kinetik

5

D

12

C

19

Energiya. saq.qonuni

6

D

13

D

20

1W

7

A

14

A









II – variant
1. “ Energiya ” so’zinin ozbekcha ma’nosini aniqlang
A) harakat B) imkoniyat C) faollik D) turtki
2. Impulsi 2,7kg ∙ m/sbo’lgan koptokning massasi 0,3 kg bo’lsa, uning tezligi nimaga teng ?
A) 9 m/s B) 0,7 m/s C) 14 m/s D) 10,9 m/s
3. Gapni to’ldiring: “ Kuchning shu kuch yo’nalishida jism bosib o’tgan yo’l bilan ko’paytmasi .... deb ataladi. ”
A) ... potensial energiya ... B) ...kinetik energiya ... C) ... mexanik ish ... D) ... quvvat ...
4. Jism yuqoriga ko’tarilishda kinetik energiyasi qanday o’zgaradi ?
A) ortadi B) kamayadi C) o’zgarmaydi D) avval ortib keyin o’zgarmaydi
5. Massasi 2 kg bo’lgan jismning 6 m balandlikdagi potensial energiyasi qanchaga teng (g=10 m/s2 ) ?
A) 240 J B) 32 J C) 9,8 J D) 120 J
6. Biror jism h balandlikda tinch turibdi. U Yerga tushayotganda qaysi energiyasi ortadi ?
A) to’liq mexanik energiyasi B) potensial energiyasi
C) kinetik energiyasi D) biror turdagi energiyasi ortmaydi.
7. To’liq mexanik energiya formulasi qaysi javobda to’g’ri yozilgan ?
I. E=mgh II. E=mv2/2 III. E=kx2/2 IV. E=Ek+Ep
A) IV. B) I, II, III, IV . C) III, IV. D) I. II

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