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8-sinf Fizika 2-chorak

InfoMaster

May 5, 2021

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8-sinf Fizika 2-chorak

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1 / 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) 15 V

C) 12 V

D) 3 v

2 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Amper

B) Volt

C) Sekund

D) Kulon

3 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) R=U/I

B) U=A/q

C) Q=ItU

D) I=q/t

4 / 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) 220 J

D) 155 J

5 / 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

6 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0,2 A

B) 0,5 A

C) 0.4 A

D) 0,1 A

7 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Elektrometr

B) Ampermetr

C) Elektroskop

D) Voltmetr

8 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) R=ρl/S

B) I=qt

C) R=U/I

D) Q=I^2Rt

9 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 500 kV

B) 5V

C) 1,5 V

D) 220 V

10 / 25

Elekt kuchlanishi formulasi berilgan javobni ko’rsating.

A) U=A|q

B) I=q/t

C) F=kq/r^2

D) E=U/d

11 / 25

Kuchlanishni o’lchaydigan asbob nima diyeladi?

A) elektroskop

B) voltmeter

C) ampermetr

D) elektrometr

12 / 25

Tok kuchining o'lchov birligi nima?

A) Kulon

B) Amper

C) Joul

D) Volt

13 / 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) 220 Ω

D) 440 Ω

14 / 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) 4 A

C) 0,8 A

D) 2 A

15 / 25

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

A) elektroskop

B) rezistor

C) potensiyometr

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) 20 Ω

B) 44.4 Ω

C) 18 Ω

D) 44 Ω

17 / 25

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

A) 2 ta

B) 4 ta

C) 6 ta

D) 0 ta

18 / 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) 0.4 Ω

B) 0.5 Ω

C) 1 Ω

D) 0.2 Ω

19 / 25

O’lchami va shakli hisobga olinmaydigan zaryadlangan jism qanday nomlanadi ?

A) Nuqtaviy zaryad

B) Manfiy zaryad

C) Elementar zaryad

D) Musbat zaryad

20 / 25

Bitta elektron massasi nechaga teng ?

A) 9,1*10^-31kg

B) 1,6*10^-19kg

C) 3,36*10^-32kg

D) 8,81*10^-19kg

21 / 25

Atom tuzilishi modulini kim kashf etgan ?

A) Beruniy

B) Kulon

C) Rezerfort

D) Demokret

22 / 25

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) to'g'ri javob yo'q

B) Musbat

C) Manfiy

D) Elektrlanmaydi

23 / 25

Elektr sig’imining o’lchov birligi nima ?

A) Sekund

B) Farad

C) Kulon

D) amper

24 / 25

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

A) Barametr

B) spedometr

C) Areometr

D) Elektroskop

25 / 25

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

A) 5,1*10⁶ N/C

B) 5*10⁵ N/C

C) 5*10‾⁵ N/C

D) 6*10⁴ N/C

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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

8-sinf Fizika 1-chorak

8-sinf Fizika 3-chorak

9-sinf Fizika 4-chorak

9-sinf Fizika 3-chorak

9-sinf Fizika 2-chorak

9-sinf Fizika 1-chorak

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