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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

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Voltmetr

B) Ampermetr

C) Elektroskop

D) Elektrometr

2 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Sekund

B) Volt

C) Kulon

D) Amper

3 / 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) 220 J

C) 20 J

D) 15 J

4 / 25

Rezistor so’zining manosi nima ?

A) Zaryad

B) Tok kuchi

C) Kuchlanish

D) Qarshilik

5 / 25

Kuchlanishni o’lchaydigan asbob nima diyeladi?

A) elektrometr

B) ampermetr

C) voltmeter

D) elektroskop

6 / 25

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

A) 15 V

B) 25 V

C) 12 V

D) 3 v

7 / 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

8 / 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) 2 A

D) 9 A

9 / 25

Elekt kuchlanishi formulasi berilgan javobni ko’rsating.

A) I=q/t

B) E=U/d

C) U=A|q

D) F=kq/r^2

10 / 25

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

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

A) 0,4

B) 0,098

C) 0.5

D) 0.017

11 / 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

12 / 25

Tok kuchining o'lchov birligi nima?

A) Volt

B) Joul

C) Amper

D) Kulon

13 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0.4 A

B) 0,2 A

C) 0,5 A

D) 0,1 A

14 / 25

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

A) Areometr

B) Elektroskop

C) Barametr

D) spedometr

15 / 25

Elektrlanishning necha turi mavjud ?

A) 5

B) 3

C) 4

D) 2

16 / 25

Elektr doimiysining son qiymati nechaga teng?

A) 3*10^-19 C

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

C) -3*10^-19 C

D) 9,1*10^-31kg

17 / 25

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

A) 2 marta ortadi

B) o`zgarmaydi

C) 2 marta kamayadi

D) 4 marta kamaydi

18 / 25

Akkumulator so’zining ma’nosi nima ?

A) To’plovchi

B) Zaryadlovchi

C) Zaryad oqimi

D) Tok manbayi

19 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Barometr

B) Elektroskop

C) Dinomometr

D) Elektrometr

20 / 25

bu shartli belgi qanday nomlanadi?

A) Qo’ng’iroq

B) Tok manbayi

C) Kalit

D) O’tkazgichlarning tutashtirmasdan kesishishi

21 / 25

Zaryadi -5*10^-8 C bo’lgan nuqtaviy zaryadning 3 sm msofada hosil qilgan elektr maydon kuchlanganligini toping?

A) 6*10⁴ N/C

B) 5,1*10⁶ N/C

C) 5*10‾⁵ N/C

D) 5*10⁵ N/C

22 / 25

Qarshiliklari 200 Ω va 300 Ω bo`lgan ikkita elektr lampa parallel ulanib, 240 V tarmoqqa kiritilgan. Umumiy tok kattaligini toping.

A) 1.8 A

B) 5 A

C) 2 A

D) 4 A

23 / 25

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

A) Ampermetr

B) Areometr

C) Voltmetr

D) kondensator

24 / 25

Bitta elektron zaryadi nechaga teng ?

A) 2,01*10^-19C

B) 9,1*10^-31C

C) 8,81*10^-19

D) 1,6*10^-19C

25 / 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) 44 V

B) 110 V

C) 220 V

D) 180 V

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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

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