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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

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) R=U/I

B) U=A/q

C) I=q/t

D) Q=ItU

2 / 25

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

A) elektrometr

B) potensiyometr

C) elektroskop

D) rezistor

3 / 25

Elekt kuchlanishi formulasi berilgan javobni ko’rsating.

A) E=U/d

B) F=kq/r^2

C) U=A|q

D) I=q/t

4 / 25

Elektr qarshiligi qaysi harf bilan belgilanadi?

A) R

B) J

C) L

D) U

5 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Voltmetr

B) Elektrometr

C) Ampermetr

D) Elektroskop

6 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) I=qt

B) R=U/I

C) Q=I^2Rt

D) R=ρl/S

7 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0,5 A

B) 0.4 A

C) 0,1 A

D) 0,2 A

8 / 25

Elektr zanjiridagi lampochkada parallel ulangan voltmeter 1,5 V ni ko’rsatmoqda. Lampochkadan 10 c zaryad o’tganda qancha ish bajariladi

A) 220 J

B) 15 J

C) 20 J

D) 155 J

9 / 25

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

A) 44 Ω

B) 44.4 Ω

C) 20 Ω

D) 18 Ω

10 / 25

Qarshiliklari 200 Ω va 300 Ω bo`lgan ikkita elektr lampa parallel ulanib, 240 V tarmoqqa kiritilgan. Umumiy tok kattaligini toping.

A) 2 A

B) 5 A

C) 4 A

D) 1.8 A

11 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Barometr

B) Elektrometr

C) Elektroskop

D) Dinomometr

12 / 25

Elektrlanishning necha turi mavjud ?

A) 3

B) 4

C) 5

D) 2

13 / 25

Akkumulator so’zining ma’nosi nima ?

A) To’plovchi

B) Zaryadlovchi

C) Tok manbayi

D) Zaryad oqimi

14 / 25

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

A) 5*10⁵ N/C

B) 5*10‾⁵ N/C

C) 6*10⁴ N/C

D) 5,1*10⁶ N/C

15 / 25

Atom so’zining ma’nosi nima ?

A) Elektr zaryat

B) Musbat zaryad

C) Bo’linmas

D) Zaryad

16 / 25

Elektr doimiysining son qiymati nechaga teng?

A) -3*10^-19 C

B) 3*10^-19 C

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

D) 9,1*10^-31kg

17 / 25

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

A) 2 marta kamayadi

B) 2 marta ortadi

C) o`zgarmaydi

D) 4 marta kamaydi

18 / 25

Qarshiligi 10 Ω bo`lgan mis o`tkazgichni 5 ta teng bo`lakka bo`lib, bo`laklar o`zaro parallel ulandi. Umumiy qarshilikni toping.

A) 1 Ω

B) 0.4 Ω

C) 0.2 Ω

D) 0.5 Ω

19 / 25

bu shartli belgi qanday nomlanadi?

A) Qo’ng’iroq

B) Kalit

C) O’tkazgichlarning tutashtirmasdan kesishishi

D) Tok manbayi

20 / 25

Bitta elektron massasi nechaga teng ?

A) 1,6*10^-19kg

B) 8,81*10^-19kg

C) 3,36*10^-32kg

D) 9,1*10^-31kg

21 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) hamma javoblar to'g'ri

B) yunon olimi Aristotel

C) grek olimi Arximed

D) yunon olimi Fales Miletskiy

22 / 25

Atom tuzilishi modulini kim kashf etgan ?

A) Demokret

B) Kulon

C) Beruniy

D) Rezerfort

23 / 25

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

A) 4 ta

B) 0 ta

C) 2 ta

D) 6 ta

24 / 25

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

A) Musbat zaryad

B) Manfiy zaryad

C) Nuqtaviy zaryad

D) Elementar zaryad

25 / 25

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

A) Tok kuchi

B) Musbat zaryad

C) Elektr toki

D) Zaryad

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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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