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8-sinf Fizika 2-chorak

InfoMaster

May 5, 2021

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8-sinf Fizika 2-chorak

Testni Shirinboyev Temurbek tayyorladi.

1 / 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) 0,5 A

C) 0,1 A

D) 0,4 A

2 / 25

Elektr qarshiligi qaysi harf bilan belgilanadi?

A) U

B) R

C) L

D) J

3 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Volt

B) Sekund

C) Kulon

D) Amper

4 / 25

Kuchlanishni o’lchaydigan asbob nima diyeladi?

A) elektroskop

B) elektrometr

C) voltmeter

D) ampermetr

5 / 25

Rezistor so’zining manosi nima ?

A) Qarshilik

B) Tok kuchi

C) Kuchlanish

D) Zaryad

6 / 25

Rezistor uchlaridagi kuchlanish 9 V ga teng . Unda 0,5 A tok utishi uchun uning qarshiligi qancha bo’lishi kerak ?

A) 44.4 Ω

B) 20 Ω

C) 18 Ω

D) 44 Ω

7 / 25

Tok kuchining o'lchov birligi nima?

A) Joul

B) Volt

C) Kulon

D) Amper

8 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) R=U/I

B) I=qt

C) Q=I^2Rt

D) R=ρl/S

9 / 25

Elektr zanjirlaridagi Lampochkadan 0,2 A tok o’moqda lampochka speraliorqali 1 minutda nechakulon zaryad o’tadi ?

A) 24 C

B) 12 C

C) 15 C

D) 10 C

10 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0.4 A

B) 0,2 A

C) 0,5 A

D) 0,1 A

11 / 25

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

A) elektrometr

B) elektroskop

C) rezistor

D) potensiyometr

12 / 25

Elektr zanjirida 2 m va ko’ndalang kesimining yuzi 0,5 mm² bo’lgan nixrom simning qarshiligini toping ?

A) 4,4 Ω

B) 440 Ω

C) 2,2 Ω

D) 220 Ω

13 / 25

Atom yadrosida ikkita proton va ikkita neytron bor. Undagi elektronlar soni nechta?

A) 4 ta

B) 6 ta

C) 2 ta

D) 0 ta

14 / 25

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

A) 5*10‾⁵ N/C

B) 5*10⁵ N/C

C) 5,1*10⁶ N/C

D) 6*10⁴ N/C

15 / 25

Bitta elektron massasi nechaga teng ?

A) 9,1*10^-31kg

B) 3,36*10^-32kg

C) 8,81*10^-19kg

D) 1,6*10^-19kg

16 / 25

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

A) o`zgarmaydi

B) 2 marta kamayadi

C) 4 marta kamaydi

D) 2 marta ortadi

17 / 25

Akkumulator so’zining ma’nosi nima ?

A) To’plovchi

B) Zaryad oqimi

C) Tok manbayi

D) Zaryadlovchi

18 / 25

Elektrlanishning necha turi mavjud ?

A) 2

B) 3

C) 4

D) 5

19 / 25

Atom so’zining ma’nosi nima ?

A) Musbat zaryad

B) Zaryad

C) Bo’linmas

D) Elektr zaryat

20 / 25

Zaryadli zarralarning tartibli harakati,ya’ni oqiminima deb nomlanadi?

A) Musbat zaryad

B) Tok kuchi

C) Zaryad

D) Elektr toki

21 / 25

Elektr doimiysining son qiymati nechaga teng?

A) 9,1*10^-31kg

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

C) -3*10^-19 C

D) 3*10^-19 C

22 / 25

Elektr zaryadining o’lchov birligi nima ?

A) volt

B) kulon

C) Amper

D) Joul

23 / 25

Bir-biridan 10sm masofada turgan sharchalardanbirining zaryadi -2*10^-8C, ikkinchisiniki esa 3*10^-8C ga teng. Ular qanday kuch bilan tortishadi?

A) 5,4*10‾⁴ N

B) 2*10‾⁸ N

C) 5*10‾⁸ N

D) 270 N

24 / 25

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

A) Elektroskop

B) spedometr

C) Areometr

D) Barametr

25 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) hamma javoblar to'g'ri

B) grek olimi Arximed

C) yunon olimi Fales Miletskiy

D) yunon olimi Aristotel

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56%-70% 3 baho

55% va kamiga 2 baho

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8-sinf Fizika 2-chorak

Baholash mezoni

86%-100% 5 baho

71%-85% 4 baho

56%-70% 3 baho

55% va kamiga 2 baho

Author: InfoMaster

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