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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

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

A) potensiyometr

B) rezistor

C) elektrometr

D) elektroskop

2 / 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) 2,2 Ω

D) 440 Ω

3 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Volt

B) Kulon

C) Sekund

D) Amper

4 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 500 kV

B) 5V

C) 1,5 V

D) 220 V

5 / 25

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

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

A) 0,098

B) 0.5

C) 0.017

D) 0,4

6 / 25

Gaz orqali elektr toki o’tish jarayoni …..deyiladi ?

A) Gaz razryadi

B) Elektroliz

C) Uchqun

D) Ion bog’lanish

7 / 25

manbaning turli qutb (faza) laridan kelayotgan ichki elektr simi ochiq joyining bir-biriga tegib ketishi…….deyiladi?

A) Tok kuchi

B) qisqa tutashuv

C) Zaryadlar

D) Elektr toki

8 / 25

Tok o’tayotgan o’tkazgich atrofida magnit maydon bor ekanligini ko’rsatgan tajriba qaysi olim nomi bilanbog’liq ?

A) Ersted

B) Joul

C) Volta

D) Amper

9 / 25

1Vatt.soat necha Jaulga teng ?

A) 5600 J

B) 3600 J

C) 5000 J

D) 360 J

10 / 25

Natriy (Na) atomida nechta electron bor ?

A) 12 ta

B) 9 ta

C) 10 ta

D) 11 ta

11 / 25

Bitta atom massasini topish formulasini ko’rsating ?

A) to'g'ri javob yo'q

B) ν=m/µ

C) m=µ/N

D) N=mn∆z

12 / 25

Bug’ mashinasini kim kashf etgan ?

A) Jems Uatt

B) Amper

C) Kulon

D) Volta

13 / 25

Atom qanday zaryadlardan tuzilgan?

A) yadrodan va manfiy zaryadlangan elektrondan

B) yadro,proton

C) proton,neytron

D) to'g'ri javob yo'q

14 / 25

Trubalarda va ariqlarda tor joyida suvning bosimi qanday bo'ladi?

A) katta

B) Hamma joyida bir xil.

C) Kichik

D) teng

15 / 25

Zaryadlangan jism atrofida nima hosil bo'ladi?

A) magnit maydoni

B) hamma zaryadlar tortiladi

C) hech nima hosil bo'lmaydi

D) Elektr maydoni

16 / 25

Birinchi kosmik tezlik berilganda kosmik kema yer sirtida qanday harakatlanadi?

A) Aylana bo'ylab

B) Ellips bo'ylab

C) Parobola bo'ylab

D) hamma javob to'g'ri

17 / 25

Kuch impulsini topish formulasini ko'rsating?

A) F=m*g

B) I=F*t

C) P=m*v

D) F=m*a

18 / 25

Yerning massasi qanchaga teng?

A) 7,35*10^22

B) to'g'ri javob yo'q

C) 2*10^30

D) 5,98*10^24

19 / 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) 180 V

B) 110 V

C) 220 V

D) 44 V

20 / 25

Akkumulator so’zining ma’nosi nima ?

A) Tok manbayi

B) Zaryad oqimi

C) Zaryadlovchi

D) To’plovchi

21 / 25

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

A) Zaryad

B) Musbat zaryad

C) Tok kuchi

D) Elektr toki

22 / 25

Atom so’zining ma’nosi nima ?

A) Elektr zaryat

B) Zaryad

C) Musbat zaryad

D) Bo’linmas

23 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Barometr

B) Elektroskop

C) Dinomometr

D) Elektrometr

24 / 25

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

A) 2*10‾⁸ N

B) 5*10‾⁸ N

C) 5,4*10‾⁴ N

D) 270 N

25 / 25

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

A) Areometr

B) spedometr

C) Elektroskop

D) Barametr

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8-sinf Fizika 4-chorak

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86%-100% 5 baho

71%-85% 4 baho

56%-70% 3 baho

55% va kamiga 2 baho

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