8-sinf II chorak Gapni to’ldiring: “ n

11. kW·h qanday kattalikning o'lchov birligi ?
A) tokning quvvati B) tok kuchi
C) elektr qarshilik D) sarflangan elektr energiyasi
12.Zanjirdagi ( rasmga qarang ) voltmеtr nimani ko`rsatadi ? O'tkazgichdagi tokning quvvati necha W ga teng ?
A) 5 V; 20 W B) 7 V ; 0,8 W C) 10 V; 20 W D) 3 V; 10 W
13.Tokning bajargan ishi qaysi asbob yordamida hisoblanadi ?
A) voltmeter B) galvanometr C) hisoblagich D) vattmetr
14. P=IU formuladan qanday fizik kattalik aniqlanadi?
A) Tokning ishi B) Kuchlanish C) Tokning quvvati D) Tok kuchi
15. Akkumulyatordagi qanday energiya elektr energiyaga aylanadi ?
A ) issiqlik energiyasi B ) kimyoviy energiya
16. Qarshiligi 4 Ω va 6 Ω bo’lgan ikki o’tkazgich parallel ulanib, ular uchiga 12 V kuchlanish berilmoqda. Zanjirdagi tok kuchi nimaga teng ?
A) 5 A B) 0,5 A C) 5 mA D) 0,05 A
17. Zanjir qarshiliklari 2 Ω va 4 Ω bo’lgan ketma – ket ulangan ikki o’tkazgichdan iborat bo’lib, undan 2 A tok o’tmoqda. Zanjirdagi umumiy kuchlanishni hisoblang
A) 12 V B) 10 V C) 1,2 V D) 8 V
18. Zanjirning bir qismi uchun Om qonuni formulasini belgilang.
A) I=q/t B) I=U/R C) I=I₁I₂ D) I=I₁=I₂
19. Zanjirdagi tok kuchini rostlashga mo’ljallangan asbob qanday ataladi ?
A) Potensiometr B) Reostat C) Rezistor D) Galvanometr
20.Elektr lampochkasi 3 V kuchlanishga va 0,5 A tok kuchiga mo’ljallangan. Uning qarshiligi qanchaga teng ( Ω ) ?
A) 6 B) 0,6 C) 3,5 D) 60

S	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20
J
B

Sinf: ____ o’quvchi: ________________________________