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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

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

2 / 25

Atom so’zining ma’nosi nima ?

A) Bo’linmas

B) Musbat zaryad

C) Zaryad

D) Elektr zaryat

3 / 25

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

A) 5 A

B) 4 A

C) 2 A

D) 1.8 A

4 / 25

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

A) spedometr

B) Barametr

C) Areometr

D) Elektroskop

5 / 25

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

A) Areometr

B) Ampermetr

C) kondensator

D) Voltmetr

6 / 25

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

A) 2 ta

B) 6 ta

C) 4 ta

D) 0 ta

7 / 25

Elektrlanishning necha turi mavjud ?

A) 4

B) 2

C) 3

D) 5

8 / 25

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

A) Elektr toki

B) Tok kuchi

C) Zaryad

D) Musbat zaryad

9 / 25

Qahrabo so’zining ma’nosi nima ?

A) Somon tortuvchi

B) Manfiy

C) Qattiq rezina

D) Elektrlanuvchi

10 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) yunon olimi Fales Miletskiy

B) yunon olimi Aristotel

C) hamma javoblar to'g'ri

D) grek olimi Arximed

11 / 25

Atom tuzilishi modulini kim kashf etgan ?

A) Kulon

B) Demokret

C) Beruniy

D) Rezerfort

12 / 25

bu shartli belgi qanday nomlanadi?

A) Tok manbayi

B) O’tkazgichlarning tutashtirmasdan kesishishi

C) Qo’ng’iroq

D) Kalit

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) Manfiy zaryad

C) Musbat zaryad

D) Nuqtaviy zaryad

15 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 5V

B) 500 kV

C) 220 V

D) 1,5 V

16 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Volt

B) Sekund

C) Amper

D) Kulon

17 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) Q=I^2Rt

B) R=ρl/S

C) I=qt

D) R=U/I

18 / 25

Elektr janjiridagi lampochkadan ma’lum vaqt davomida 25 c zaryad o’tib , 75 J ish bajarildi,lampochka qanday elektr kuchlanish ostida yongan?

A) 25 V

B) 3 v

C) 12 V

D) 15 V

19 / 25

Rezistor so’zining manosi nima ?

A) Tok kuchi

B) Zaryad

C) Qarshilik

D) Kuchlanish

20 / 25

Tok kuchining o'lchov birligi nima?

A) Amper

B) Kulon

C) Joul

D) Volt

21 / 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) 6 A

C) 0,4 A

D) 0,1 A

22 / 25

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

A) 18 Ω

B) 44 Ω

C) 44.4 Ω

D) 20 Ω

23 / 25

Elektr qarshiligi qaysi harf bilan belgilanadi?

A) R

B) U

C) L

D) J

24 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Elektrometr

B) Elektroskop

C) Ampermetr

D) Voltmetr

25 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) Q=ItU

B) R=U/I

C) I=q/t

D) U=A/q

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56%-70% 3 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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