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8-sinf Fizika 1-chorak

InfoMaster

May 5, 2021

80 Ko'rishlar 2 izohlar

SaqlashSaqlanganOlib tashlandi 1

8-sinf Fizika 1-chorak

Testni Shirinboyev Temurbek tayyorladi.

1 / 25

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

A) 2 ta

B) 6 ta

C) 4 ta

D) 0 ta

2 / 25

Elektrlanishning necha turi mavjud ?

A) 3

B) 5

C) 2

D) 4

3 / 25

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

A) 4 marta kamaydi

B) 2 marta kamayadi

C) o`zgarmaydi

D) 2 marta ortadi

4 / 25

Bitta elektron zaryadi nechaga teng ?

A) 1,6*10^-19C

B) 8,81*10^-19

C) 9,1*10^-31C

D) 2,01*10^-19C

5 / 25

Akkumulator so’zining ma’nosi nima ?

A) Tok manbayi

B) Zaryad oqimi

C) To’plovchi

D) Zaryadlovchi

6 / 25

Bitta elektron massasi nechaga teng ?

A) 8,81*10^-19kg

B) 1,6*10^-19kg

C) 9,1*10^-31kg

D) 3,36*10^-32kg

7 / 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

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) 2*10‾⁸ N

B) 270 N

C) 5*10‾⁸ N

D) 5,4*10‾⁴ N

9 / 25

bu shartli belgi qanday nomlanadi?

A) Kalit

B) O’tkazgichlarning tutashtirmasdan kesishishi

C) Qo’ng’iroq

D) Tok manbayi

10 / 25

Elektr sig’imining o’lchov birligi nima ?

A) Kulon

B) Sekund

C) amper

D) Farad

11 / 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) 180 V

B) 44 V

C) 110 V

D) 220 V

12 / 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) 0.4 Ω

C) 1 Ω

D) 0.2 Ω

13 / 25

Qahrabo so’zining ma’nosi nima ?

A) Somon tortuvchi

B) Manfiy

C) Elektrlanuvchi

D) Qattiq rezina

14 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Elektrometr

B) Dinomometr

C) Elektroskop

D) Barometr

15 / 25

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

A) Barametr

B) spedometr

C) Elektroskop

D) Areometr

16 / 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) 5*10‾⁵ N/C

C) 5*10⁵ N/C

D) 6*10⁴ N/C

17 / 25

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

A) Areometr

B) Ampermetr

C) Voltmetr

D) kondensator

18 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) grek olimi Arximed

B) yunon olimi Fales Miletskiy

C) hamma javoblar to'g'ri

D) yunon olimi Aristotel

19 / 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

20 / 25

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) Manfiy

B) to'g'ri javob yo'q

C) Musbat

D) Elektrlanmaydi

21 / 25

Elektr zaryadining o’lchov birligi nima ?

A) Joul

B) Amper

C) volt

D) kulon

22 / 25

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

A) Manfiy zaryad

B) Musbat zaryad

C) Elementar zaryad

D) Nuqtaviy zaryad

23 / 25

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

A) Zaryad

B) Elektr toki

C) Tok kuchi

D) Musbat zaryad

24 / 25

Atom tuzilishi modulini kim kashf etgan ?

A) Beruniy

B) Rezerfort

C) Kulon

D) Demokret

25 / 25

Atom so’zining ma’nosi nima ?

A) Bo’linmas

B) Musbat zaryad

C) Elektr zaryat

D) Zaryad

Baholash mezoni

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71%-85% 4 baho

56%-70% 3 baho

55% va kamiga 2 baho

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8-sinf Fizika 1-chorak

Baholash mezoni

86%-100% 5 baho

71%-85% 4 baho

56%-70% 3 baho

55% va kamiga 2 baho

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