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8-sinf Fizika 4-chorak

InfoMaster

May 5, 2021

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8-sinf Fizika 4-chorak

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1 / 25

Jism impulsi birligini ko'rsating

A) kg

B) kg*m/s

C) N*S

D) m/s^2

2 / 25

Kuchlanishni o'lchash uchun qanday asbobdan foydalaniladi?

A) voltmetr

B) Elektroskop

C) hamma javoblar to'g'ri

D) Dinamometr

3 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Dinomometr

B) Elektrometr

C) Barometr

D) Elektroskop

4 / 25

Qahrabo so’zining ma’nosi nima ?

A) Elektrlanuvchi

B) Manfiy

C) Somon tortuvchi

D) Qattiq rezina

5 / 25

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

A) Manfiy zaryad

B) Musbat zaryad

C) Elementar zaryad

D) Nuqtaviy zaryad

6 / 25

Elektr zaryadining o’lchov birligi nima ?

A) Amper

B) volt

C) kulon

D) Joul

7 / 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

8 / 25

Elektrlanishning necha turi mavjud ?

A) 3

B) 5

C) 2

D) 4

9 / 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) 1.8 A

D) 2 A

10 / 25

Ishqalangan jismlarning tortishish hodisasini birinchi bo’lib kim aytgan?

A) grek olimi Arximed

B) yunon olimi Aristotel

C) yunon olimi Fales Miletskiy

D) hamma javoblar to'g'ri

11 / 25

Elektr tokining bajargan ishini formulasini ko’rsating toping ?

A) R=UI

B) Q=I^2RT

C) J=q/t

D) A=UIT

12 / 25

Bug’ mashinasini kim kashf etgan ?

A) Volta

B) Amper

C) Jems Uatt

D) Kulon

13 / 25

Ionlar orasida Kulon kuchi tufayli vijudga keladigan kimyoviy bog’lanish……deb ataladi?

A) Elektrolitlar

B) Qutbli bog’lanish

C) Kovalent bog’lanish

D) Ionli bog’lanish

14 / 25

220 V kuchlanishda 0,25 A tok olib yonayotgan elektr lampochkadagi tokning quvvatini toping ?

A) 5,5 W

B) 500 W

C) 550 W

D) 55 W

15 / 25

1Vatt.soat necha Jaulga teng ?

A) 3600 J

B) 5000 J

C) 5600 J

D) 360 J

16 / 25

Abu Rayhon Beruniy o’z asarlarida magnitni qanday nom bilan atagan ?

A) Doimiy magnitlar

B) Ohangrabo-temirni tortuvchi

C) Tabiy magnitlar

D) Suniy magnitlar

17 / 25

Rezistor so’zining manosi nima ?

A) Qarshilik

B) Kuchlanish

C) Tok kuchi

D) Zaryad

18 / 25

Elekt kuchlanishi formulasi berilgan javobni ko’rsating.

A) F=kq/r^2

B) E=U/d

C) I=q/t

D) U=A|q

19 / 25

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

A) 0,1 A

B) 0,5 A

C) 6 A

D) 0,4 A

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) 4 A

B) 0,8 A

C) 2 A

D) 9 A

21 / 25

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

A) 220 Ω

B) 440 Ω

C) 2,2 Ω

D) 4,4 Ω

22 / 25

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

A) elektrometr

B) potensiyometr

C) elektroskop

D) rezistor

23 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 5V

B) 220 V

C) 1,5 V

D) 500 kV

24 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Ampermetr

B) Elektrometr

C) Elektroskop

D) Voltmetr

25 / 25

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

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

A) 0,098

B) 0,4

C) 0.017

D) 0.5

Baholash mezoni

86%-100% 5 baho

71%-85% 4 baho

56%-70% 3 baho

55% va kamiga 2 baho

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8-sinf Fizika 4-chorak

Baholash mezoni

86%-100% 5 baho

71%-85% 4 baho

56%-70% 3 baho

55% va kamiga 2 baho

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