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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 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) 220 V

B) 44 V

C) 110 V

D) 180 V

2 / 25

Elektr doimiysining son qiymati nechaga teng?

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

B) -3*10^-19 C

C) 3*10^-19 C

D) 9,1*10^-31kg

3 / 25

bu shartli belgi qanday nomlanadi?

A) O’tkazgichlarning tutashtirmasdan kesishishi

B) Tok manbayi

C) Qo’ng’iroq

D) Kalit

4 / 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

5 / 25

Atom tuzilishi modulini kim kashf etgan ?

A) Beruniy

B) Demokret

C) Kulon

D) Rezerfort

6 / 25

Qahrabo so’zining ma’nosi nima ?

A) Manfiy

B) Somon tortuvchi

C) Elektrlanuvchi

D) Qattiq rezina

7 / 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) 5,4*10‾⁴ N

C) 2*10‾⁸ N

D) 5*10‾⁸ N

8 / 25

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

A) 6*10⁴ N/C

B) 5*10⁵ N/C

C) 5*10‾⁵ N/C

D) 5,1*10⁶ N/C

9 / 25

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

A) Areometr

B) Barametr

C) spedometr

D) Elektroskop

10 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) yunon olimi Fales Miletskiy

B) hamma javoblar to'g'ri

C) yunon olimi Aristotel

D) grek olimi Arximed

11 / 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) 4 A

C) 5 A

D) 1.8 A

12 / 25

Atom so’zining ma’nosi nima ?

A) Elektr zaryat

B) Bo’linmas

C) Zaryad

D) Musbat zaryad

13 / 25

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

A) Zaryad

B) Musbat zaryad

C) Tok kuchi

D) Elektr toki

14 / 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) 18 Ω

D) 20 Ω

15 / 25

Kuchlanishni o’lchaydigan asbob nima diyeladi?

A) elektroskop

B) elektrometr

C) voltmeter

D) ampermetr

16 / 25

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

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

A) 0.017

B) 0,098

C) 0.5

D) 0,4

17 / 25

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

A) 6 A

B) 0,4 A

C) 0,1 A

D) 0,5 A

18 / 25

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

A) potensiyometr

B) rezistor

C) elektrometr

D) elektroskop

19 / 25

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

A) 24 C

B) 15 C

C) 10 C

D) 12 C

20 / 25

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

A) 220 Ω

B) 4,4 Ω

C) 440 Ω

D) 2,2 Ω

21 / 25

Elekt kuchlanishi formulasi berilgan javobni ko’rsating.

A) I=q/t

B) U=A|q

C) E=U/d

D) F=kq/r^2

22 / 25

Elektr qarshiligi qaysi harf bilan belgilanadi?

A) U

B) L

C) J

D) R

23 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Volt

B) Sekund

C) Kulon

D) Amper

24 / 25

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

A) 155 J

B) 20 J

C) 15 J

D) 220 J

25 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) U=A/q

B) I=q/t

C) R=U/I

D) Q=ItU

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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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