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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

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Dinomometr

B) Barometr

C) Elektroskop

D) Elektrometr

2 / 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

3 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) hamma javoblar to'g'ri

B) grek olimi Arximed

C) yunon olimi Aristotel

D) yunon olimi Fales Miletskiy

4 / 25

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

A) 2*10‾⁸ N

B) 5,4*10‾⁴ N

C) 270 N

D) 5*10‾⁸ N

5 / 25

Bitta elektron zaryadi nechaga teng ?

A) 9,1*10^-31C

B) 2,01*10^-19C

C) 8,81*10^-19

D) 1,6*10^-19C

6 / 25

Elektr zaryadlarini to’plash uchun mo’ljallangan asbob qanday nomlanadi?

A) Voltmetr

B) kondensator

C) Areometr

D) Ampermetr

7 / 25

Qahrabo so’zining ma’nosi nima ?

A) Manfiy

B) Somon tortuvchi

C) Elektrlanuvchi

D) Qattiq rezina

8 / 25

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

A) 2 marta ortadi

B) 2 marta kamayadi

C) 4 marta kamaydi

D) o`zgarmaydi

9 / 25

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

A) Musbat zaryad

B) Elektr toki

C) Tok kuchi

D) Zaryad

10 / 25

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

A) 0 ta

B) 2 ta

C) 4 ta

D) 6 ta

11 / 25

Bitta elektron massasi nechaga teng ?

A) 8,81*10^-19kg

B) 3,36*10^-32kg

C) 1,6*10^-19kg

D) 9,1*10^-31kg

12 / 25

Elektr sig’imining o’lchov birligi nima ?

A) Farad

B) Sekund

C) amper

D) Kulon

13 / 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) 0.2 Ω

B) 0.5 Ω

C) 1 Ω

D) 0.4 Ω

14 / 25

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

A) Elementar zaryad

B) Nuqtaviy zaryad

C) Musbat zaryad

D) Manfiy zaryad

15 / 25

Kuchlanishni o’lchaydigan asbob nima diyeladi?

A) elektroskop

B) voltmeter

C) ampermetr

D) elektrometr

16 / 25

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

A) 10 C

B) 24 C

C) 15 C

D) 12 C

17 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Volt

B) Sekund

C) Kulon

D) Amper

18 / 25

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

A) 0,5 A

B) 0,4 A

C) 0,1 A

D) 6 A

19 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 500 kV

B) 1,5 V

C) 220 V

D) 5V

20 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) I=q/t

B) U=A/q

C) Q=ItU

D) R=U/I

21 / 25

Rezistor so’zining manosi nima ?

A) Qarshilik

B) Kuchlanish

C) Zaryad

D) Tok kuchi

22 / 25

Uzunligi 1 m, ko’ndalang kesimining yuzi 0,4 mm² bo’lgan nikelin simning uchlaridagi kuchlanish 2 V gat eng. Shu elektr zanjir orqali o’tayotgan tok kuchini aniqlang?

$\rho =4\cdot 10^{-7} \Omega \cdot m$

A) 2 A

B) 4 A

C) 9 A

D) 0,8 A

23 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) R=ρl/S

B) Q=I^2Rt

C) I=qt

D) R=U/I

24 / 25

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

A) 440 Ω

B) 2,2 Ω

C) 4,4 Ω

D) 220 Ω

25 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0,1 A

B) 0,2 A

C) 0.4 A

D) 0,5 A

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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

8-sinf Fizika 1-chorak

8-sinf Fizika 3-chorak

9-sinf Fizika 4-chorak

9-sinf Fizika 3-chorak

9-sinf Fizika 2-chorak

9-sinf Fizika 1-chorak

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