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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

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) Elektrlanmaydi

B) to'g'ri javob yo'q

C) Musbat

D) Manfiy

2 / 25

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

A) 0 ta

B) 6 ta

C) 4 ta

D) 2 ta

3 / 25

Akkumulator so’zining ma’nosi nima ?

A) Tok manbayi

B) Zaryadlovchi

C) To’plovchi

D) Zaryad oqimi

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

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

A) Elektroskop

B) Areometr

C) spedometr

D) Barametr

6 / 25

Elektr sig’imining o’lchov birligi nima ?

A) Kulon

B) Sekund

C) amper

D) Farad

7 / 25

Qahrabo so’zining ma’nosi nima ?

A) Somon tortuvchi

B) Elektrlanuvchi

C) Qattiq rezina

D) Manfiy

8 / 25

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

A) 5*10‾⁵ N/C

B) 5*10⁵ N/C

C) 6*10⁴ N/C

D) 5,1*10⁶ N/C

9 / 25

Bitta elektron zaryadi nechaga teng ?

A) 9,1*10^-31C

B) 8,81*10^-19

C) 1,6*10^-19C

D) 2,01*10^-19C

10 / 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

11 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Dinomometr

B) Elektrometr

C) Barometr

D) Elektroskop

12 / 25

Elektr zaryadining o’lchov birligi nima ?

A) volt

B) kulon

C) Amper

D) Joul

13 / 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

14 / 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 Ω

C) 44.4 Ω

D) 18 Ω

15 / 25

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

A) potensiyometr

B) rezistor

C) elektroskop

D) elektrometr

16 / 25

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

A) 15 V

B) 3 v

C) 25 V

D) 12 V

17 / 25

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

A) 15 J

B) 155 J

C) 220 J

D) 20 J

18 / 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) 2 A

C) 4 A

D) 9 A

19 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) Q=ItU

B) I=q/t

C) U=A/q

D) R=U/I

20 / 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

21 / 25

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

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

A) 0.5

B) 0.017

C) 0,4

D) 0,098

22 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) I=qt

B) R=U/I

C) R=ρl/S

D) Q=I^2Rt

23 / 25

Rezistor so’zining manosi nima ?

A) Tok kuchi

B) Kuchlanish

C) Zaryad

D) Qarshilik

24 / 25

Elektr qarshiligi qaysi harf bilan belgilanadi?

A) R

B) J

C) L

D) U

25 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Elektrometr

B) Elektroskop

C) Ampermetr

D) Voltmetr

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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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