8-sinf Fizika 1-chorak

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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) 44 V

C) 110 V

D) 180 V

2 / 25

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

A) Manfiy zaryad

B) Nuqtaviy zaryad

C) Musbat zaryad

D) Elementar zaryad

3 / 25

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

A) o`zgarmaydi

B) 2 marta ortadi

C) 4 marta kamaydi

D) 2 marta kamayadi

4 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Elektrometr

B) Elektroskop

C) Barometr

D) Dinomometr

5 / 25

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

A) Voltmetr

B) Areometr

C) kondensator

D) Ampermetr

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) 0.4 Ω

B) 0.2 Ω

C) 0.5 Ω

D) 1 Ω

7 / 25

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) Manfiy

B) to'g'ri javob yo'q

C) Musbat

D) Elektrlanmaydi

8 / 25

Bir-biridan 10sm masofada turgan sharchalardanbirining zaryadi -2*10^-8C, ikkinchisiniki esa 3*10^-8C ga teng. Ular qanday kuch bilan tortishadi?

A) 5,4*10‾⁴ N

B) 270 N

C) 2*10‾⁸ N

D) 5*10‾⁸ N

9 / 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

10 / 25

Bitta elektron massasi nechaga teng ?

A) 8,81*10^-19kg

B) 9,1*10^-31kg

C) 3,36*10^-32kg

D) 1,6*10^-19kg

11 / 25

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

A) 5 A

B) 4 A

C) 2 A

D) 1.8 A

12 / 25

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

A) Musbat zaryad

B) Elektr toki

C) Tok kuchi

D) Zaryad

13 / 25

Atom tuzilishi modulini kim kashf etgan ?

A) Rezerfort

B) Kulon

C) Demokret

D) Beruniy

14 / 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) 6*10⁴ N/C

C) 5,1*10⁶ N/C

D) 5*10⁵ N/C

15 / 25

Elektr zaryadining o’lchov birligi nima ?

A) Amper

B) Joul

C) kulon

D) volt

16 / 25

Elektr sig’imining o’lchov birligi nima ?

A) Farad

B) amper

C) Kulon

D) Sekund

17 / 25

Bitta elektron zaryadi nechaga teng ?

A) 2,01*10^-19C

B) 9,1*10^-31C

C) 8,81*10^-19

D) 1,6*10^-19C

18 / 25

Akkumulator so’zining ma’nosi nima ?

A) To’plovchi

B) Zaryadlovchi

C) Tok manbayi

D) Zaryad oqimi

19 / 25

Atom so’zining ma’nosi nima ?

A) Musbat zaryad

B) Bo’linmas

C) Zaryad

D) Elektr zaryat

20 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) yunon olimi Aristotel

B) grek olimi Arximed

C) hamma javoblar to'g'ri

D) yunon olimi Fales Miletskiy

21 / 25

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

A) Elektroskop

B) spedometr

C) Areometr

D) Barametr

22 / 25

bu shartli belgi qanday nomlanadi?

A) Qo’ng’iroq

B) Kalit

C) Tok manbayi

D) O’tkazgichlarning tutashtirmasdan kesishishi

23 / 25

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

A) 4 ta

B) 0 ta

C) 2 ta

D) 6 ta

24 / 25

Qahrabo so’zining ma’nosi nima ?

A) Manfiy

B) Somon tortuvchi

C) Elektrlanuvchi

D) Qattiq rezina

25 / 25

Elektrlanishning necha turi mavjud ?

A) 5

B) 4

C) 2

D) 3

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fikrlar (2)

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Baholash mezoni

86%-100% 5 baho

71%-85% 4 baho

56%-70% 3 baho

55% va kamiga 2 baho