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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) 110 V

C) 180 V

D) 44 V

2 / 25

Elektrlanishning necha turi mavjud ?

A) 3

B) 4

C) 5

D) 2

3 / 25

Elektr zaryadining o’lchov birligi nima ?

A) kulon

B) Amper

C) volt

D) Joul

4 / 25

Elektr sig’imining o’lchov birligi nima ?

A) Sekund

B) Kulon

C) Farad

D) amper

5 / 25

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

A) Barametr

B) Elektroskop

C) Areometr

D) spedometr

6 / 25

Atom so’zining ma’nosi nima ?

A) Bo’linmas

B) Musbat zaryad

C) Elektr zaryat

D) Zaryad

7 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Elektrometr

B) Elektroskop

C) Dinomometr

D) Barometr

8 / 25

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

A) Ampermetr

B) Voltmetr

C) Areometr

D) kondensator

9 / 25

Qahrabo so’zining ma’nosi nima ?

A) Manfiy

B) Elektrlanuvchi

C) Somon tortuvchi

D) Qattiq rezina

10 / 25

bu shartli belgi qanday nomlanadi?

A) Qo’ng’iroq

B) Tok manbayi

C) O’tkazgichlarning tutashtirmasdan kesishishi

D) Kalit

11 / 25

Qarshiligi 10 Ω bo`lgan mis o`tkazgichni 5 ta teng bo`lakka bo`lib, bo`laklar o`zaro parallel ulandi. Umumiy qarshilikni toping.

A) 1 Ω

B) 0.2 Ω

C) 0.5 Ω

D) 0.4 Ω

12 / 25

Elektr doimiysining son qiymati nechaga teng?

A) 9,1*10^-31kg

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

C) -3*10^-19 C

D) 3*10^-19 C

13 / 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*10⁵ N/C

C) 5,1*10⁶ N/C

D) 5*10‾⁵ N/C

14 / 25

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) to'g'ri javob yo'q

B) Elektrlanmaydi

C) Musbat

D) Manfiy

15 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 1,5 V

B) 5V

C) 220 V

D) 500 kV

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) 20 Ω

C) 44 Ω

D) 44.4 Ω

17 / 25

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

A) 6 A

B) 0,1 A

C) 0,4 A

D) 0,5 A

18 / 25

Elektr qarshiligi qaysi harf bilan belgilanadi?

A) U

B) J

C) L

D) R

19 / 25

Elektr zanjirlaridagi Lampochkadan 0,2 A tok o’moqda lampochka speraliorqali 1 minutda nechakulon zaryad o’tadi ?

A) 12 C

B) 10 C

C) 15 C

D) 24 C

20 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) R=U/I

B) U=A/q

C) Q=ItU

D) I=q/t

21 / 25

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

A) 4,4 Ω

B) 2,2 Ω

C) 220 Ω

D) 440 Ω

22 / 25

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

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

A) 0,4

B) 0.5

C) 0,098

D) 0.017

23 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) Q=I^2Rt

B) R=U/I

C) I=qt

D) R=ρl/S

24 / 25

Rezistor so’zining manosi nima ?

A) Zaryad

B) Kuchlanish

C) Tok kuchi

D) Qarshilik

25 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0,5 A

B) 0,1 A

C) 0.4 A

D) 0,2 A

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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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