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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

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) 180 V

C) 110 V

D) 44 V

2 / 25

bu shartli belgi qanday nomlanadi?

A) Kalit

B) Qo’ng’iroq

C) Tok manbayi

D) O’tkazgichlarning tutashtirmasdan kesishishi

3 / 25

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

A) 2 marta ortadi

B) 4 marta kamaydi

C) o`zgarmaydi

D) 2 marta kamayadi

4 / 25

Elektr zaryadining o’lchov birligi nima ?

A) volt

B) Amper

C) kulon

D) Joul

5 / 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) 1.8 A

C) 4 A

D) 2 A

6 / 25

Bitta elektron massasi nechaga teng ?

A) 1,6*10^-19kg

B) 8,81*10^-19kg

C) 3,36*10^-32kg

D) 9,1*10^-31kg

7 / 25

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

A) Barametr

B) Areometr

C) Elektroskop

D) spedometr

8 / 25

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

A) kondensator

B) Ampermetr

C) Voltmetr

D) Areometr

9 / 25

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

A) 4 ta

B) 2 ta

C) 6 ta

D) 0 ta

10 / 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) 5,1*10⁶ N/C

C) 6*10⁴ N/C

D) 5*10‾⁵ N/C

11 / 25

Atom tuzilishi modulini kim kashf etgan ?

A) Rezerfort

B) Kulon

C) Demokret

D) Beruniy

12 / 25

Akkumulator so’zining ma’nosi nima ?

A) Tok manbayi

B) To’plovchi

C) Zaryadlovchi

D) Zaryad oqimi

13 / 25

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

A) Zaryad

B) Musbat zaryad

C) Tok kuchi

D) Elektr toki

14 / 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

15 / 25

Rezistor so’zining manosi nima ?

A) Qarshilik

B) Tok kuchi

C) Kuchlanish

D) Zaryad

16 / 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) 44.4 Ω

C) 44 Ω

D) 20 Ω

17 / 25

Elektr zanjiridagi lampochkada parallel ulangan voltmeter 1,5 V ni ko’rsatmoqda. Lampochkadan 10 c zaryad o’tganda qancha ish bajariladi

A) 155 J

B) 15 J

C) 20 J

D) 220 J

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) 12 V

B) 3 v

C) 15 V

D) 25 V

19 / 25

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

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

A) 0,4

B) 0.5

C) 0.017

D) 0,098

20 / 25

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

A) elektrometr

B) elektroskop

C) potensiyometr

D) rezistor

21 / 25

Kuchlanishni o’lchaydigan asbob nima diyeladi?

A) elektroskop

B) ampermetr

C) voltmeter

D) elektrometr

22 / 25

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

A) 0,4 A

B) 0,5 A

C) 0,1 A

D) 6 A

23 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Amper

B) Kulon

C) Volt

D) Sekund

24 / 25

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

A) 4,4 Ω

B) 220 Ω

C) 440 Ω

D) 2,2 Ω

25 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) R=U/I

B) I=qt

C) R=ρl/S

D) Q=I^2Rt

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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

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