8-sinf fizika 1- variant

8-SINF FIZIKA 1- VARIANT

1. Qarshiligi 3 om va 6 om bo’lgan o’tkazgichlar parallel ulangan . Ularning umumiy qarshiligi nimaga teng ? A)2 B) 4om C) 1om D) 18om

2.Elektr o’tkazmaydigan modda va jismlarni … deb ataladi ?

A) o’tkazgichlar B) dielektriklar C) electron D) proton

3.Elektr zaryadi birligi nima?

A) Culon B) metr C) litr D) Amper

4.Elektr zaryadini o’lchovchi asbob?

A) elektrometr B) Ampermetr C) Voltmetr D) termometr

5. 51 kiloom necha omga teng ?

A) 510 B) 5100 C) 51000 D) 510000

6. Elektr kuchlanishi formulasi?

A) E=F/Q B) U=A/Q C) I=Q/t D) R=U/I

7.Tok kuchi formulasi ?

A) E=F/Q B) U=A/Q C) I=Q/t D) R=U/I

8. Elektr qarshiligini formulasi?

A) E=F/Q B) U=A/Q C) I=Q/t D) R=U/I

9. . Elektr kuchlanishi o’lchov birligi ?

A) Culon B) metr C)Volt D) Amper

10. Tok kuchi o’lchov birligi ?

A) Culon B) metr C)Volt D) Amper

11. . Elektr qarshiligini o’lchov birligi ?

A) Culon B)Om C)Volt D) Amper

12.Elektr lampochkasining spiralidan o’tuvchi tok kuchi 0.5 A. Lampochka 1.5V lik kuchlanish manbayiga ulangan bo’lsa , uning qarshiligi nimaga teng ?

A) 3 B)5 C) 8 D)2

13.Zanjirni manbaga ulash usuli necha turga bo’linadi?

A) 3 B)5 C) 8 D)2

14 Qarshiliklari 4 om va 6 om bo’lan ikkita o’tkazgich ketma-ket ulanganda zanjirdagi ummiy qarshilik qanday bo’ladi A) 1 om B) 10 om C) 3 om D) 8 om

15 Om qonuni formulasi qaysi javobda berilgan

1. 
   I=U/R B) S=VT C) R=PL/S D) R=R₁+R₂
   

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
A	B	A	A	C	B	C	D	C	D	B	A	D	B	A

8-SINF FIZIKA 2- VARIANT

1. Zanjirdagi tok kuchi qanday asbob yordamida o’lchanadi?

A) ampermetrda B) voltmetrda C) kilovoltda D) b va c javob to’g’ri

2. Tok kuchi qaysi harf bilan belgilanadi? A) I B) A C) V D) R

3. Ampermetr elektr zanjirdagi tok kuchi o’lchanadigan iste’molchi bilan qanday ulanadi?

A) parallel B) uzib – ulab C) HAR HIL D) A va B javob to’g’ri

4. Elektr kuchlanishi o’lchov birligi ?

A) Culon B) metr C)Volt D) Amper

5. Elektr zaryadini o’lchovchi asbob?

A) elektrometr B) Ampermetr C) Voltmetr D) termometr
6. Elektr zanjiridagi tokni rostlash uchun qo’llaniladigan turli qarshilikli elektr asbob qanday asbob?

A) reostst B) resistor C) potensiometr D) amper

7. Elektr zanjirdagi tok kuchi va o’zgartirish uchun qo’llaniladigan elektr asbob qanday asbob? A) Potensiometr B) ampermetr C) Termometr D) amper

8. Elekter zanjiridagi kuchlanishni rostlash, o’zgartirish uchun qo’llaniladigan elektr asbob qanday asbob?

A) potensiometr B) voltmeter C) ampermetr D) c va d to’g’ri javob

9. “O’tkazgichdagi tok kuchi uning uchlari orasidagi kuchlanishga to’g’ri proporsional, o’tkazgichning qarshiligiga teskari proporsional” – Bu qaysi qonunning ta’rifi?

A) Nyuton B) Faradey C) Kapler D) Om

10. Iste’molchilar simni qanday ulaganda o’tkazgich orasidagi kuchlanish bir xil bo’ladi?

A) parallel

B) ketma – ket

C) ketma – ket emas

D) parallel va ketma-ket

11. Agar zanjirga n ta lampochka ketma – ket ulansa, zanjirdagi o’tkazgichlarning to’liq qarshiligi qanday?

A) R=NR B) R=R₁R₂+R₃ C) U=R₁+R₂+R₃ D) to’g’ri javob yo’q

12. Elektr qarshilik qanday harf bilan belgilanadi?

A) I B) A C) V D) R

13. Zaryadli zarralarning tartibli harakati, ya’ni oqimi nima deb ataladi?

A) elektr maydon B) sim C) elektr tok D) saqlagich

14. Qarshiligi 440 Ω bo’lgan elektr lampochka 0,5 A li tokda yonmoqda, Lompochka qisqichlaridagi kuchlanish qancha?

A) 220 V B) 20 V C) 550 V D) 300 V

15. Elektr kuchlanish qanday asbob yordamida o’lchanadi?

A) amper B) rheostat C) amper, voltmeter D) voltmeter

1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
A	A	A	C	A	B	A	A	D	A	A	D	C	A	D