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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

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) 1.8 A

D) 2 A

2 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Dinomometr

B) Elektrometr

C) Elektroskop

D) Barometr

3 / 25

Atom tuzilishi modulini kim kashf etgan ?

A) Beruniy

B) Rezerfort

C) Demokret

D) Kulon

4 / 25

Atom so’zining ma’nosi nima ?

A) Zaryad

B) Bo’linmas

C) Musbat zaryad

D) Elektr zaryat

5 / 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

6 / 25

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

A) 2 ta

B) 6 ta

C) 0 ta

D) 4 ta

7 / 25

Elektr sig’imining o’lchov birligi nima ?

A) amper

B) Kulon

C) Farad

D) Sekund

8 / 25

Qahrabo so’zining ma’nosi nima ?

A) Qattiq rezina

B) Manfiy

C) Elektrlanuvchi

D) Somon tortuvchi

9 / 25

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

A) 270 N

B) 5*10‾⁸ N

C) 5,4*10‾⁴ N

D) 2*10‾⁸ N

10 / 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) 44 V

B) 110 V

C) 180 V

D) 220 V

11 / 25

bu shartli belgi qanday nomlanadi?

A) Kalit

B) Tok manbayi

C) Qo’ng’iroq

D) O’tkazgichlarning tutashtirmasdan kesishishi

12 / 25

Bitta elektron zaryadi nechaga teng ?

A) 9,1*10^-31C

B) 8,81*10^-19

C) 2,01*10^-19C

D) 1,6*10^-19C

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) 0.5 Ω

B) 1 Ω

C) 0.4 Ω

D) 0.2 Ω

14 / 25

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

A) Elektroskop

B) Areometr

C) spedometr

D) Barametr

15 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) I=q/t

B) Q=ItU

C) U=A/q

D) R=U/I

16 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) Q=I^2Rt

B) I=qt

C) R=ρl/S

D) R=U/I

17 / 25

Tok kuchining o'lchov birligi nima?

A) Joul

B) Kulon

C) Amper

D) Volt

18 / 25

Elektr qarshiligi qaysi harf bilan belgilanadi?

A) J

B) R

C) L

D) U

19 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0.4 A

B) 0,2 A

C) 0,1 A

D) 0,5 A

20 / 25

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

A) 4,4 Ω

B) 2,2 Ω

C) 440 Ω

D) 220 Ω

21 / 25

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

A) 12 V

B) 15 V

C) 3 v

D) 25 V

22 / 25

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

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

A) 0.017

B) 0,4

C) 0.5

D) 0,098

23 / 25

Kuchlanishni o’lchaydigan asbob nima diyeladi?

A) elektroskop

B) voltmeter

C) ampermetr

D) elektrometr

24 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Sekund

B) Kulon

C) Amper

D) Volt

25 / 25

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

A) elektrometr

B) potensiyometr

C) elektroskop

D) rezistor

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

8-sinf Fizika 1-chorak

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