8-sinf Fizika 2-chorak

Tomonidan yaratilgan InfoMaster

Testni Shirinboyev Temurbek tayyorladi.

1 / 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) 220 V

B) 110 V

C) 180 V

D) 44 V

2 / 25

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

A) Elementar zaryad

B) Musbat zaryad

C) Manfiy zaryad

D) Nuqtaviy zaryad

3 / 25

Bitta elektron zaryadi nechaga teng ?

A) 9,1*10^-31C

B) 2,01*10^-19C

C) 1,6*10^-19C

D) 8,81*10^-19

4 / 25

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

A) Barametr

B) spedometr

C) Areometr

D) Elektroskop

5 / 25

Qahrabo so’zining ma’nosi nima ?

A) Qattiq rezina

B) Somon tortuvchi

C) Elektrlanuvchi

D) Manfiy

6 / 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) 0.5 Ω

B) 1 Ω

C) 0.4 Ω

D) 0.2 Ω

7 / 25

Atom tuzilishi modulini kim kashf etgan ?

A) Beruniy

B) Rezerfort

C) Kulon

D) Demokret

8 / 25

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

A) Areometr

B) kondensator

C) Voltmetr

D) Ampermetr

9 / 25

Elektr zaryadining o’lchov birligi nima ?

A) Amper

B) volt

C) kulon

D) Joul

10 / 25

Atom so’zining ma’nosi nima ?

A) Bo’linmas

B) Zaryad

C) Musbat zaryad

D) Elektr zaryat

11 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Elektroskop

B) Barometr

C) Elektrometr

D) Dinomometr

12 / 25

Zaryadli zarralarning tartibli harakati,ya’ni oqiminima deb nomlanadi?

A) Elektr toki

B) Zaryad

C) Tok kuchi

D) Musbat zaryad

13 / 25

Akkumulator so’zining ma’nosi nima ?

A) To’plovchi

B) Zaryadlovchi

C) Tok manbayi

D) Zaryad oqimi

14 / 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) 5 A

C) 2 A

D) 4 A

15 / 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) 2*10‾⁸ N

C) 5,4*10‾⁴ N

D) 5*10‾⁸ N

16 / 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

17 / 25

Elektr qarshiligi qaysi harf bilan belgilanadi?

A) U

B) J

C) R

D) L

18 / 25

Tok kuchining o'lchov birligi nima?

A) Joul

B) Amper

C) Volt

D) Kulon

19 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Elektrometr

B) Ampermetr

C) Elektroskop

D) Voltmetr

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) 9 A

B) 0,8 A

C) 2 A

D) 4 A

21 / 25

Kuchlanishni o’lchaydigan asbob nima diyeladi?

A) elektroskop

B) voltmeter

C) ampermetr

D) elektrometr

22 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Amper

B) Sekund

C) Kulon

D) Volt

23 / 25

Elektr zanjirlaridagi Lampochkadan 0,2 A tok o’moqda lampochka speraliorqali 1 minutda nechakulon zaryad o’tadi ?

A) 24 C

B) 10 C

C) 15 C

D) 12 C

24 / 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) 220 J

C) 155 J

D) 20 J

25 / 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) 18 Ω

C) 44.4 Ω

D) 44 Ω

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Author: InfoMaster

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