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

A) 440 Ω

B) 4,4 Ω

C) 220 Ω

D) 2,2 Ω

2 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 220 V

B) 500 kV

C) 1,5 V

D) 5V

3 / 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) 0,8 A

B) 4 A

C) 9 A

D) 2 A

4 / 25

Rezistor uchlaridagi kuchlanish 9 V ga teng . Unda 0,5 A tok utishi uchun uning qarshiligi qancha bo’lishi kerak ?

A) 18 Ω

B) 44.4 Ω

C) 20 Ω

D) 44 Ω

5 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0,2 A

B) 0.4 A

C) 0,5 A

D) 0,1 A

6 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Volt

B) Kulon

C) Amper

D) Sekund

7 / 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

8 / 25

Rezistor so’zining manosi nima ?

A) Tok kuchi

B) Zaryad

C) Kuchlanish

D) Qarshilik

9 / 25

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

A) 220 J

B) 15 J

C) 20 J

D) 155 J

10 / 25

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

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

A) 0,4

B) 0,098

C) 0.017

D) 0.5

11 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Elektrometr

B) Ampermetr

C) Voltmetr

D) Elektroskop

12 / 25

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

A) elektroskop

B) rezistor

C) elektrometr

D) potensiyometr

13 / 25

Qahrabo so’zining ma’nosi nima ?

A) Manfiy

B) Somon tortuvchi

C) Qattiq rezina

D) Elektrlanuvchi

14 / 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*10‾⁵ N/C

D) 5*10⁵ N/C

15 / 25

Elektr doimiysining son qiymati nechaga teng?

A) -3*10^-19 C

B) 3*10^-19 C

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

D) 9,1*10^-31kg

16 / 25

Akkumulator so’zining ma’nosi nima ?

A) Tok manbayi

B) Zaryad oqimi

C) To’plovchi

D) Zaryadlovchi

17 / 25

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

A) kondensator

B) Ampermetr

C) Areometr

D) Voltmetr

18 / 25

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

A) 2 marta ortadi

B) 4 marta kamaydi

C) 2 marta kamayadi

D) o`zgarmaydi

19 / 25

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) to'g'ri javob yo'q

B) Manfiy

C) Elektrlanmaydi

D) Musbat

20 / 25

Qarshiliklari 200 Ω va 300 Ω bo`lgan ikkita elektr lampa parallel ulanib, 240 V tarmoqqa kiritilgan. Umumiy tok kattaligini toping.

A) 1.8 A

B) 4 A

C) 5 A

D) 2 A

21 / 25

Elektrlanishning necha turi mavjud ?

A) 2

B) 4

C) 3

D) 5

22 / 25

Elektr sig’imining o’lchov birligi nima ?

A) Sekund

B) Farad

C) Kulon

D) amper

23 / 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) 1 Ω

C) 0.2 Ω

D) 0.5 Ω

24 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) yunon olimi Fales Miletskiy

B) grek olimi Arximed

C) hamma javoblar to'g'ri

D) yunon olimi Aristotel

25 / 25

Elektr zaryadining o’lchov birligi nima ?

A) kulon

B) Amper

C) volt

D) Joul

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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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