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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

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 220 V

B) 1,5 V

C) 500 kV

D) 5V

2 / 25

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

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

A) 0,098

B) 0.017

C) 0.5

D) 0,4

3 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0,2 A

B) 0,1 A

C) 0,5 A

D) 0.4 A

4 / 25

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

A) rezistor

B) elektrometr

C) elektroskop

D) potensiyometr

5 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Ampermetr

B) Elektrometr

C) Elektroskop

D) Voltmetr

6 / 25

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

A) 18 Ω

B) 44 Ω

C) 20 Ω

D) 44.4 Ω

7 / 25

Tok kuchining o'lchov birligi nima?

A) Amper

B) Joul

C) Kulon

D) Volt

8 / 25

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

A) 25 V

B) 3 v

C) 15 V

D) 12 V

9 / 25

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

A) 0,5 A

B) 6 A

C) 0,1 A

D) 0,4 A

10 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) U=A/q

B) Q=ItU

C) R=U/I

D) I=q/t

11 / 25

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

A) 270 N

B) 5*10‾⁸ N

C) 2*10‾⁸ N

D) 5,4*10‾⁴ N

12 / 25

Atom so’zining ma’nosi nima ?

A) Bo’linmas

B) Zaryad

C) Elektr zaryat

D) Musbat zaryad

13 / 25

Atom tuzilishi modulini kim kashf etgan ?

A) Beruniy

B) Kulon

C) Demokret

D) Rezerfort

14 / 25

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

A) 0 ta

B) 4 ta

C) 6 ta

D) 2 ta

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

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Elektrometr

B) Elektroskop

C) Barometr

D) Dinomometr

17 / 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) 5 A

D) 1.8 A

18 / 25

Elektr doimiysining son qiymati nechaga teng?

A) 3*10^-19 C

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

C) 9,1*10^-31kg

D) -3*10^-19 C

19 / 25

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

A) Voltmetr

B) Areometr

C) kondensator

D) Ampermetr

20 / 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*10‾⁵ N/C

C) 5,1*10⁶ N/C

D) 6*10⁴ N/C

21 / 25

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) Manfiy

B) Elektrlanmaydi

C) to'g'ri javob yo'q

D) Musbat

22 / 25

bu shartli belgi qanday nomlanadi?

A) Tok manbayi

B) Qo’ng’iroq

C) O’tkazgichlarning tutashtirmasdan kesishishi

D) Kalit

23 / 25

Elektr sig’imining o’lchov birligi nima ?

A) amper

B) Sekund

C) Farad

D) Kulon

24 / 25

Elektrlanishning necha turi mavjud ?

A) 3

B) 5

C) 2

D) 4

25 / 25

Elektr zaryadining o’lchov birligi nima ?

A) volt

B) kulon

C) Amper

D) Joul

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56%-70% 3 baho

55% va kamiga 2 baho

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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

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