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8-sinf Fizika 4-chorak

InfoMaster

May 5, 2021

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8-sinf Fizika 4-chorak

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1 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) grek olimi Arximed

B) hamma javoblar to'g'ri

C) yunon olimi Aristotel

D) yunon olimi Fales Miletskiy

2 / 25

Elektrlanishning necha turi mavjud ?

A) 4

B) 5

C) 2

D) 3

3 / 25

Zaryadi -5*10^-8 C bo’lgan nuqtaviy zaryadning 3 sm msofada hosil qilgan elektr maydon kuchlanganligini toping?

A) 5,1*10⁶ N/C

B) 6*10⁴ N/C

C) 5*10‾⁵ N/C

D) 5*10⁵ N/C

4 / 25

O’lchami va shakli hisobga olinmaydigan zaryadlangan jism qanday nomlanadi ?

A) Musbat zaryad

B) Nuqtaviy zaryad

C) Elementar zaryad

D) Manfiy zaryad

5 / 25

Atom so’zining ma’nosi nima ?

A) Zaryad

B) Elektr zaryat

C) Musbat zaryad

D) Bo’linmas

6 / 25

Jismlarning elektrlanganligini sezish ,kuzatish uchun qo’llaniladigan asbob qanday nomlanadi ?

A) Areometr

B) Elektroskop

C) spedometr

D) Barametr

7 / 25

Ikkita o`tkazgichlar avval ketma- ket, so`ngra parallel ulandi. Bunda uning umumiy qarsiligi qanday o`zgaradi?

A) 2 marta ortadi

B) o`zgarmaydi

C) 2 marta kamayadi

D) 4 marta kamaydi

8 / 25

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) to'g'ri javob yo'q

B) Musbat

C) Elektrlanmaydi

D) Manfiy

9 / 25

Elektr sig’imining o’lchov birligi nima ?

A) Sekund

B) Farad

C) amper

D) Kulon

10 / 25

Elektr doimiysining son qiymati nechaga teng?

A) 9,1*10^-31kg

B) -3*10^-19 C

C) 3*10^-19 C

D) 8,85*10^-12C^2/N*m^2

11 / 25

Yerning massasi qanchaga teng?

A) 5,98*10^24

B) 2*10^30

C) 7,35*10^22

D) to'g'ri javob yo'q

12 / 25

Quyidagi formulalardan qaysi biri kuch momentini formulasi.

A) M=F/L

B) M=FL

C) v=s/t

D) F=mg

13 / 25

Kuch impulsini topish formulasini ko'rsating?

A) F=m*a

B) P=m*v

C) I=F*t

D) F=m*g

14 / 25

Elektr zanjiridagi lampochkadan 5 minutda 30 C zaryad o’tgani ma’lum. Zanjirdagi ampermetr lampochkadan qancha tok o’tayotganini ko’rsating?

A) 6 A

B) 0,1 A

C) 0,5 A

D) 0,4 A

15 / 25

Rezistor so’zining manosi nima ?

A) Zaryad

B) Tok kuchi

C) Kuchlanish

D) Qarshilik

16 / 25

Kuchlanishni o’lchaydigan asbob nima diyeladi?

A) elektrometr

B) ampermetr

C) elektroskop

D) voltmeter

17 / 25

Elektr zanjirda tokni rostlash uchun qo’llaniladigan turli qarshilikli elektr asbobi qanday nomlanadi ?

A) elektroskop

B) potensiyometr

C) elektrometr

D) rezistor

18 / 25

Tok kuchining o'lchov birligi nima?

A) Kulon

B) Volt

C) Amper

D) Joul

19 / 25

Cho’ntak fanari lampochkasidagi kuchlanish 4,5 V, tok kuchi 0,2 A bo’lsa ,1minutdaqancha elektr energiya sarflanadi?

A) 54 J

B) 50 J

C) 780 J

D) 60 J

20 / 25

Yorug’lik tezligini birinchi bo’lib kim aniqlagan

A) Nyuton

B) J.Uatt

C) O.Ryomer

D) Rezirfort

21 / 25

Elektrolidan tok o’tayotganda elektrodlarda modda ajralib chiqish hodisasi……deb ataladi

A) Turli eritma

B) Suvli eritma

C) Ion bog’lanish

D) Eletroliz

22 / 25

Elektrolizdan foydalanib ,buyumlarning sirtini qiyin oksidlanadigan metallar bilan qoplash….deyiladi ?

A) Ion bog’lanish

B) eletrlolez

C) Galvonaplastina

D) Galvonastegiya

23 / 25

Gaz orqali elektr toki o’tish jarayoni …..deyiladi ?

A) Elektroliz

B) Uchqun

C) Ion bog’lanish

D) Gaz razryadi

24 / 25

Faradey doimiysining son qiymatini toping ?

A) 7800 C/mol

B) 96500 C/mol

C) 7200 C/mol

D) 8000C/mol

25 / 25

Elektr tokining bajargan ishini formulasini ko’rsating toping ?

A) A=UIT

B) R=UI

C) J=q/t

D) Q=I^2RT

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8-sinf Fizika 4-chorak

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86%-100% 5 baho

71%-85% 4 baho

56%-70% 3 baho

55% va kamiga 2 baho

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