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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

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

A) 6 ta

B) 4 ta

C) 0 ta

D) 2 ta

2 / 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) 0.4 Ω

C) 1 Ω

D) 0.5 Ω

3 / 25

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

A) 5*10⁵ N/C

B) 5,1*10⁶ N/C

C) 5*10‾⁵ N/C

D) 6*10⁴ N/C

4 / 25

Elektr zaryadining o’lchov birligi nima ?

A) Amper

B) kulon

C) volt

D) Joul

5 / 25

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

A) Barametr

B) spedometr

C) Areometr

D) Elektroskop

6 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) yunon olimi Aristotel

B) grek olimi Arximed

C) hamma javoblar to'g'ri

D) yunon olimi Fales Miletskiy

7 / 25

Bitta elektron zaryadi nechaga teng ?

A) 2,01*10^-19C

B) 8,81*10^-19

C) 1,6*10^-19C

D) 9,1*10^-31C

8 / 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) 180 V

B) 110 V

C) 44 V

D) 220 V

9 / 25

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) Manfiy

B) to'g'ri javob yo'q

C) Musbat

D) Elektrlanmaydi

10 / 25

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

A) Voltmetr

B) kondensator

C) Areometr

D) Ampermetr

11 / 25

Elektrlanishning necha turi mavjud ?

A) 4

B) 5

C) 3

D) 2

12 / 25

Bitta elektron massasi nechaga teng ?

A) 8,81*10^-19kg

B) 9,1*10^-31kg

C) 1,6*10^-19kg

D) 3,36*10^-32kg

13 / 25

Elektr sig’imining o’lchov birligi nima ?

A) amper

B) Sekund

C) Kulon

D) Farad

14 / 25

Akkumulator so’zining ma’nosi nima ?

A) Zaryad oqimi

B) To’plovchi

C) Tok manbayi

D) Zaryadlovchi

15 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Elektroskop

B) Barometr

C) Dinomometr

D) Elektrometr

16 / 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

17 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) U=A/q

B) R=U/I

C) I=q/t

D) Q=ItU

18 / 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

19 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) R=U/I

B) I=qt

C) R=ρl/S

D) Q=I^2Rt

20 / 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) 9 A

C) 0,8 A

D) 4 A

21 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Volt

B) Amper

C) Sekund

D) Kulon

22 / 25

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

A) 20 J

B) 15 J

C) 155 J

D) 220 J

23 / 25

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

A) 2,2 Ω

B) 220 Ω

C) 440 Ω

D) 4,4 Ω

24 / 25

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

A) 0,4 A

B) 6 A

C) 0,1 A

D) 0,5 A

25 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0,5 A

B) 0.4 A

C) 0,2 A

D) 0,1 A

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8-sinf Fizika 2-chorak

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86%-100% 5 baho

71%-85% 4 baho

56%-70% 3 baho

55% va kamiga 2 baho

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