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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 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

2 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) R=ρl/S

B) Q=I^2Rt

C) R=U/I

D) I=qt

3 / 25

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

A) 44 Ω

B) 20 Ω

C) 44.4 Ω

D) 18 Ω

4 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Amper

B) Kulon

C) Sekund

D) Volt

5 / 25

Elektr zanjiridagi lampochkadan 5 minutda 30 C zaryad o’tgani ma’lum. Zanjirdagi ampermetr lampochkadan qancha tok o’tayotganini ko’rsating?

A) 0,4 A

B) 0,1 A

C) 0,5 A

D) 6 A

6 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 220 V

B) 1,5 V

C) 500 kV

D) 5V

7 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Ampermetr

B) Elektrometr

C) Voltmetr

D) Elektroskop

8 / 25

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

A) 220 Ω

B) 4,4 Ω

C) 2,2 Ω

D) 440 Ω

9 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0,1 A

B) 0.4 A

C) 0,2 A

D) 0,5 A

10 / 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) 155 J

C) 220 J

D) 15 J

11 / 25

Bitta elektron massasi nechaga teng ?

A) 3,36*10^-32kg

B) 1,6*10^-19kg

C) 8,81*10^-19kg

D) 9,1*10^-31kg

12 / 25

Akkumulator so’zining ma’nosi nima ?

A) Zaryadlovchi

B) Tok manbayi

C) To’plovchi

D) Zaryad oqimi

13 / 25

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

A) spedometr

B) Elektroskop

C) Areometr

D) Barametr

14 / 25

Elektrlanishning necha turi mavjud ?

A) 5

B) 3

C) 4

D) 2

15 / 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) 44 V

C) 180 V

D) 220 V

16 / 25

bu shartli belgi qanday nomlanadi?

A) Kalit

B) O’tkazgichlarning tutashtirmasdan kesishishi

C) Qo’ng’iroq

D) Tok manbayi

17 / 25

Bitta elektron zaryadi nechaga teng ?

A) 8,81*10^-19

B) 1,6*10^-19C

C) 9,1*10^-31C

D) 2,01*10^-19C

18 / 25

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

A) 5*10⁵ N/C

B) 5,1*10⁶ N/C

C) 6*10⁴ N/C

D) 5*10‾⁵ N/C

19 / 25

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

A) 4 A

B) 2 A

C) 1.8 A

D) 5 A

20 / 25

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

A) 4 ta

B) 6 ta

C) 2 ta

D) 0 ta

21 / 25

Atom so’zining ma’nosi nima ?

A) Zaryad

B) Elektr zaryat

C) Bo’linmas

D) Musbat zaryad

22 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) grek olimi Arximed

B) hamma javoblar to'g'ri

C) yunon olimi Aristotel

D) yunon olimi Fales Miletskiy

23 / 25

Elektr zaryadining o’lchov birligi nima ?

A) kulon

B) Joul

C) volt

D) Amper

24 / 25

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

A) Tok kuchi

B) Zaryad

C) Elektr toki

D) Musbat zaryad

25 / 25

Qahrabo so’zining ma’nosi nima ?

A) Manfiy

B) Somon tortuvchi

C) Elektrlanuvchi

D) Qattiq rezina

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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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8-sinf Fizika 3-chorak

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