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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 qarshiligi qaysi harf bilan belgilanadi?

A) R

B) J

C) U

D) L

2 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Elektroskop

B) Voltmetr

C) Ampermetr

D) Elektrometr

3 / 25

Kuchlanishni o’lchaydigan asbob nima diyeladi?

A) voltmeter

B) elektroskop

C) ampermetr

D) elektrometr

4 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0,1 A

B) 0.4 A

C) 0,2 A

D) 0,5 A

5 / 25

Temir moddasining (20⁰C da) solishtirma qashiligi nechaga teng?

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

A) 0,4

B) 0.017

C) 0,098

D) 0.5

6 / 25

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

A) elektrometr

B) rezistor

C) potensiyometr

D) elektroskop

7 / 25

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

A) 15 V

B) 3 v

C) 12 V

D) 25 V

8 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) Q=I^2Rt

B) I=qt

C) R=U/I

D) R=ρl/S

9 / 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) 9 A

B) 0,8 A

C) 2 A

D) 4 A

10 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) U=A/q

B) R=U/I

C) Q=ItU

D) I=q/t

11 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 1,5 V

B) 500 kV

C) 5V

D) 220 V

12 / 25

Akkumulator so’zining ma’nosi nima ?

A) Zaryad oqimi

B) To’plovchi

C) Zaryadlovchi

D) Tok manbayi

13 / 25

Elektr zaryadining o’lchov birligi nima ?

A) Joul

B) kulon

C) Amper

D) volt

14 / 25

Atom tuzilishi modulini kim kashf etgan ?

A) Kulon

B) Demokret

C) Beruniy

D) Rezerfort

15 / 25

Elektr zanjirida ketma-ket ulangan iste`molchilar qarshiliklari 80, 120 va 200 Om dan iborat. Umumiy kuchlanish 220 V bo`lsa, uchinchi iste`molchidagi kuchlanish tushuvini toping

A) 110 V

B) 44 V

C) 220 V

D) 180 V

16 / 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*10‾⁸ N

B) 270 N

C) 2*10‾⁸ N

D) 5,4*10‾⁴ N

17 / 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

18 / 25

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

A) Elektr toki

B) Musbat zaryad

C) Zaryad

D) Tok kuchi

19 / 25

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

A) 4 A

B) 5 A

C) 1.8 A

D) 2 A

20 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) grek olimi Arximed

B) yunon olimi Fales Miletskiy

C) yunon olimi Aristotel

D) hamma javoblar to'g'ri

21 / 25

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

A) kondensator

B) Areometr

C) Voltmetr

D) Ampermetr

22 / 25

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

A) Areometr

B) Barametr

C) spedometr

D) Elektroskop

23 / 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) 4 marta kamaydi

D) o`zgarmaydi

24 / 25

Atom so’zining ma’nosi nima ?

A) Musbat zaryad

B) Bo’linmas

C) Zaryad

D) Elektr zaryat

25 / 25

Elektr sig’imining o’lchov birligi nima ?

A) Kulon

B) amper

C) Sekund

D) Farad

Baholash mezoni

86%-100% 5 baho

71%-85% 4 baho

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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