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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

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

A) Hamma joyida bir xil.

B) Kichik

C) teng

D) katta

2 / 25

Kuch impulsini topish formulasini ko'rsating?

A) F=m*a

B) P=m*v

C) F=m*g

D) I=F*t

3 / 25

Atmosfera bosimi qanday asbob bilan o'lchanadi?

A) Barometr

B) laktometr

C) Termometr

D) Monometr

4 / 25

Atom qanday zaryadlardan tuzilgan?

A) to'g'ri javob yo'q

B) proton,neytron

C) yadrodan va manfiy zaryadlangan elektrondan

D) yadro,proton

5 / 25

Jism impulsi birligini ko'rsating

A) N*S

B) kg

C) kg*m/s

D) m/s^2

6 / 25

Birinchi kosmik tezlik berilganda kosmik kema yer sirtida qanday harakatlanadi?

A) Ellips bo'ylab

B) hamma javob to'g'ri

C) Parobola bo'ylab

D) Aylana bo'ylab

7 / 25

Jismlarning elektrlanganligini payqovchi asbob qaysi javobda keltirilgan?

A) Elektroskop

B) Ampermetr

C) hamma javob to'g'ri

D) Voltmetr

8 / 25

Cho’ntak fanari lampochkasidagi kuchlanish 4,5 V, tok kuchi 0,2 A bo’lsa ,1minutdaqancha elektr energiya sarflanadi?

A) 54 J

B) 50 J

C) 780 J

D) 60 J

9 / 25

Elektr tokining quvvati formulasini ko’rsating ?

A) N=A/t

B) R=I/U

C) I=q/t

D) P=IU

10 / 25

Bitta atom massasini topish formulasini ko’rsating ?

A) to'g'ri javob yo'q

B) N=mn∆z

C) ν=m/µ

D) m=µ/N

11 / 25

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

A) Gaz razryadi

B) Uchqun

C) Elektroliz

D) Ion bog’lanish

12 / 25

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

A) Barametr

B) spedometr

C) Areometr

D) Elektroskop

13 / 25

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

A) 4 marta kamaydi

B) 2 marta ortadi

C) 2 marta kamayadi

D) o`zgarmaydi

14 / 25

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) Manfiy

B) Elektrlanmaydi

C) to'g'ri javob yo'q

D) Musbat

15 / 25

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

A) Elektr toki

B) Zaryad

C) Musbat zaryad

D) Tok kuchi

16 / 25

Elektr zaryadining o’lchov birligi nima ?

A) Amper

B) volt

C) Joul

D) kulon

17 / 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) 5,4*10‾⁴ N

C) 5*10‾⁸ N

D) 270 N

18 / 25

Qahrabo so’zining ma’nosi nima ?

A) Somon tortuvchi

B) Elektrlanuvchi

C) Qattiq rezina

D) Manfiy

19 / 25

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

A) 3 v

B) 15 V

C) 12 V

D) 25 V

20 / 25

Tok kuchi formulasi keltirilgan javobni aniqlang?

A) R=U/I

B) Q=ItU

C) I=q/t

D) U=A/q

21 / 25

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

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

A) 0,4

B) 0.017

C) 0.5

D) 0,098

22 / 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 Ω

C) 44.4 Ω

D) 20 Ω

23 / 25

Elekt kuchlanishi formulasi berilgan javobni ko’rsating.

A) E=U/d

B) U=A|q

C) I=q/t

D) F=kq/r^2

24 / 25

Tok kuchining o'lchov birligi nima?

A) Joul

B) Volt

C) Amper

D) Kulon

25 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 500 kV

B) 220 V

C) 1,5 V

D) 5V

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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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