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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 tokining quvvati formulasini ko’rsating ?

A) P=IU

B) R=I/U

C) N=A/t

D) I=q/t

2 / 25

Faradey doimiysining son qiymatini toping ?

A) 7800 C/mol

B) 96500 C/mol

C) 8000C/mol

D) 7200 C/mol

3 / 25

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

A) o`zgarmaydi

B) 2 marta ortadi

C) 2 marta kamayadi

D) 4 marta kamaydi

4 / 25

Elektr doimiysining son qiymati nechaga teng?

A) -3*10^-19 C

B) 9,1*10^-31kg

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

D) 3*10^-19 C

5 / 25

O’lchami va shakli hisobga olinmaydigan zaryadlangan jism qanday nomlanadi ?

A) Musbat zaryad

B) Nuqtaviy zaryad

C) Elementar zaryad

D) Manfiy zaryad

6 / 25

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

A) Musbat zaryad

B) Zaryad

C) Elektr toki

D) Tok kuchi

7 / 25

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) Manfiy

B) Elektrlanmaydi

C) Musbat

D) to'g'ri javob yo'q

8 / 25

Bitta elektron zaryadi nechaga teng ?

A) 2,01*10^-19C

B) 9,1*10^-31C

C) 1,6*10^-19C

D) 8,81*10^-19

9 / 25

Qanday kuch jismni 0,5 masofaga ko'chirilganda 100 J ish bajaradi?

A) 50 N

B) 100N

C) 200 N

D) 20 N

10 / 25

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

A) Kichik

B) Hamma joyida bir xil.

C) katta

D) teng

11 / 25

Yerning massasi qanchaga teng?

A) 5,98*10^24

B) 7,35*10^22

C) to'g'ri javob yo'q

D) 2*10^30

12 / 25

Atom qanday zaryadlardan tuzilgan?

A) proton,neytron

B) to'g'ri javob yo'q

C) yadrodan va manfiy zaryadlangan elektrondan

D) yadro,proton

13 / 25

Kosmik kemani kim yaratdi?

A) to'g'ri javob yo'q

B) Korolyov

C) Y. A. Gagarin

D) Siyolkovskiy

14 / 25

Tok kuchini o’lchaydigan asbob qanday nomlanadi ?

A) Ampermetr

B) Elektroskop

C) Elektrometr

D) Voltmetr

15 / 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) 0,5 A

D) 0,4 A

16 / 25

Elekt kuchlanishi formulasi berilgan javobni ko’rsating.

A) U=A|q

B) E=U/d

C) I=q/t

D) F=kq/r^2

17 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 220 V

B) 1,5 V

C) 500 kV

D) 5V

18 / 25

Rezistor so’zining manosi nima ?

A) Kuchlanish

B) Tok kuchi

C) Qarshilik

D) Zaryad

19 / 25

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

A) 220 J

B) 15 J

C) 20 J

D) 155 J

20 / 25

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

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

A) 0.5

B) 0,4

C) 0.017

D) 0,098

21 / 25

Elektr qashiligi formulasi qaysi javobda keltirilgan?

A) R=U/I

B) Q=I^2Rt

C) I=qt

D) R=ρl/S

22 / 25

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

A) elektrometr

B) elektroskop

C) rezistor

D) potensiyometr

23 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Sekund

B) Volt

C) Amper

D) Kulon

24 / 25

Kuchlanishni o’lchaydigan asbob nima diyeladi?

A) elektroskop

B) ampermetr

C) elektrometr

D) voltmeter

25 / 25

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

A) 4,4 Ω

B) 440 Ω

C) 220 Ω

D) 2,2 Ω

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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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