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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

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) 1.8 A

D) 5 A

2 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Dinomometr

B) Elektroskop

C) Barometr

D) Elektrometr

3 / 25

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

A) Manfiy zaryad

B) Elementar zaryad

C) Nuqtaviy zaryad

D) Musbat zaryad

4 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) yunon olimi Fales Miletskiy

B) grek olimi Arximed

C) yunon olimi Aristotel

D) hamma javoblar to'g'ri

5 / 25

Atom so’zining ma’nosi nima ?

A) Elektr zaryat

B) Bo’linmas

C) Musbat zaryad

D) Zaryad

6 / 25

Bitta elektron zaryadi nechaga teng ?

A) 9,1*10^-31C

B) 1,6*10^-19C

C) 8,81*10^-19

D) 2,01*10^-19C

7 / 25

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

A) 0 ta

B) 6 ta

C) 2 ta

D) 4 ta

8 / 25

Atom tuzilishi modulini kim kashf etgan ?

A) Beruniy

B) Rezerfort

C) Kulon

D) Demokret

9 / 25

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) to'g'ri javob yo'q

B) Elektrlanmaydi

C) Manfiy

D) Musbat

10 / 25

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

A) Tok kuchi

B) Elektr toki

C) Zaryad

D) Musbat zaryad

11 / 25

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

A) Areometr

B) Ampermetr

C) Voltmetr

D) kondensator

12 / 25

Elektr doimiysining son qiymati nechaga teng?

A) 9,1*10^-31kg

B) -3*10^-19 C

C) 3*10^-19 C

D) 8,85*10^-12C^2/N*m^2

13 / 25

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

A) o`zgarmaydi

B) 2 marta kamayadi

C) 2 marta ortadi

D) 4 marta kamaydi

14 / 25

Akkumulator so’zining ma’nosi nima ?

A) Zaryadlovchi

B) To’plovchi

C) Zaryad oqimi

D) Tok manbayi

15 / 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

16 / 25

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

A) 4,4 Ω

B) 440 Ω

C) 220 Ω

D) 2,2 Ω

17 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Volt

B) Sekund

C) Amper

D) Kulon

18 / 25

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

A) 3 v

B) 15 V

C) 12 V

D) 25 V

19 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Ampermetr

B) Elektroskop

C) Elektrometr

D) Voltmetr

20 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) U=A/q

B) Q=ItU

C) I=q/t

D) R=U/I

21 / 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) 4 A

C) 9 A

D) 2 A

22 / 25

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

A) rezistor

B) potensiyometr

C) elektroskop

D) elektrometr

23 / 25

Rezistor so’zining manosi nima ?

A) Zaryad

B) Kuchlanish

C) Tok kuchi

D) Qarshilik

24 / 25

Elekt kuchlanishi formulasi berilgan javobni ko’rsating.

A) F=kq/r^2

B) E=U/d

C) U=A|q

D) I=q/t

25 / 25

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

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

A) 0.5

B) 0,4

C) 0,098

D) 0.017

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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

8-sinf Fizika 1-chorak

8-sinf Fizika 3-chorak

9-sinf Fizika 4-chorak

9-sinf Fizika 3-chorak

9-sinf Fizika 2-chorak

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