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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 doimiysining son qiymati nechaga teng?

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

B) -3*10^-19 C

C) 9,1*10^-31kg

D) 3*10^-19 C

2 / 25

Elektrlanishning necha turi mavjud ?

A) 4

B) 5

C) 2

D) 3

3 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Elektroskop

B) Dinomometr

C) Barometr

D) Elektrometr

4 / 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

5 / 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

6 / 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

7 / 25

bu shartli belgi qanday nomlanadi?

A) Kalit

B) Qo’ng’iroq

C) O’tkazgichlarning tutashtirmasdan kesishishi

D) Tok manbayi

8 / 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) 0.5 Ω

D) 0.2 Ω

9 / 25

Ikkita o`tkazgichlar avval ketma- ket, so`ngra parallel ulandi. Bunda uning umumiy qarsiligi qanday o`zgaradi?

A) 4 marta kamaydi

B) 2 marta kamayadi

C) o`zgarmaydi

D) 2 marta ortadi

10 / 25

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

A) Ampermetr

B) Areometr

C) kondensator

D) Voltmetr

11 / 25

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

A) Musbat zaryad

B) Nuqtaviy zaryad

C) Elementar zaryad

D) Manfiy zaryad

12 / 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) 180 V

C) 44 V

D) 220 V

13 / 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) 6*10⁴ N/C

C) 5*10⁵ N/C

D) 5*10‾⁵ N/C

14 / 25

Qahrabo so’zining ma’nosi nima ?

A) Elektrlanuvchi

B) Somon tortuvchi

C) Qattiq rezina

D) Manfiy

15 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 5V

B) 500 kV

C) 1,5 V

D) 220 V

16 / 25

Tok kuchining o'lchov birligi nima?

A) Volt

B) Amper

C) Kulon

D) Joul

17 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) U=A/q

B) Q=ItU

C) I=q/t

D) R=U/I

18 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Voltmetr

B) Elektrometr

C) Elektroskop

D) Ampermetr

19 / 25

Rezistor so’zining manosi nima ?

A) Kuchlanish

B) Tok kuchi

C) Qarshilik

D) Zaryad

20 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Sekund

B) Volt

C) Amper

D) Kulon

21 / 25

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

A) rezistor

B) potensiyometr

C) elektroskop

D) elektrometr

22 / 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) 0,8 A

C) 9 A

D) 4 A

23 / 25

Elekt kuchlanishi formulasi berilgan javobni ko’rsating.

A) I=q/t

B) E=U/d

C) F=kq/r^2

D) U=A|q

24 / 25

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

A) 3 v

B) 25 V

C) 12 V

D) 15 V

25 / 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) 4,4 Ω

D) 440 Ω

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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