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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

Bitta atom massasini topish formulasini ko’rsating ?

A) m=µ/N

B) ν=m/µ

C) to'g'ri javob yo'q

D) N=mn∆z

2 / 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) 60 J

D) 780 J

3 / 25

1Vatt.soat necha Jaulga teng ?

A) 360 J

B) 3600 J

C) 5000 J

D) 5600 J

4 / 25

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

A) Gaz razryadi

B) Ion bog’lanish

C) Uchqun

D) Elektroliz

5 / 25

Elektrolizdan foydalanib ,buyumlarning sirtini qiyin oksidlanadigan metallar bilan qoplash….deyiladi ?

A) eletrlolez

B) Galvonastegiya

C) Galvonaplastina

D) Ion bog’lanish

6 / 25

Elektr tokining bajargan ishini formulasini ko’rsating toping ?

A) J=q/t

B) R=UI

C) A=UIT

D) Q=I^2RT

7 / 25

Elektr toki bajargan ishining asosiy birligi nima?

A) Volt

B) Vatt sekund

C) Paskal

D) amper

8 / 25

Qahrabo so’zining ma’nosi nima ?

A) Qattiq rezina

B) Elektrlanuvchi

C) Manfiy

D) Somon tortuvchi

9 / 25

Jismlarning elektrlanganlikdarajasini aniqlovchisbob qanday nomlanadi ?

A) Barometr

B) Elektroskop

C) Dinomometr

D) Elektrometr

10 / 25

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

A) Ampermetr

B) Voltmetr

C) Areometr

D) kondensator

11 / 25

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

A) 270 N

B) 2*10‾⁸ N

C) 5*10‾⁸ N

D) 5,4*10‾⁴ N

12 / 25

Bitta elektron zaryadi nechaga teng ?

A) 9,1*10^-31C

B) 8,81*10^-19

C) 2,01*10^-19C

D) 1,6*10^-19C

13 / 25

Tok kuchining o'lchov birligi nima?

A) Volt

B) Amper

C) Joul

D) Kulon

14 / 25

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

A) 2,2 Ω

B) 440 Ω

C) 220 Ω

D) 4,4 Ω

15 / 25

Rezistor so’zining manosi nima ?

A) Tok kuchi

B) Zaryad

C) Qarshilik

D) Kuchlanish

16 / 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) 6 A

C) 0,1 A

D) 0,5 A

17 / 25

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

A) 20 J

B) 220 J

C) 155 J

D) 15 J

18 / 25

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

A) 25 V

B) 3 v

C) 12 V

D) 15 V

19 / 25

Elekt kuchlanishi formulasi berilgan javobni ko’rsating.

A) E=U/d

B) F=kq/r^2

C) I=q/t

D) U=A|q

20 / 25

Zaryadlangan jism atrofida nima hosil bo'ladi?

A) hech nima hosil bo'lmaydi

B) hamma zaryadlar tortiladi

C) magnit maydoni

D) Elektr maydoni

21 / 25

Birinchi kosmik tezlik berilganda kosmik kema yer sirtida qanday harakatlanadi?

A) Parobola bo'ylab

B) hamma javob to'g'ri

C) Aylana bo'ylab

D) Ellips bo'ylab

22 / 25

Atom qanday zaryadlardan tuzilgan?

A) proton,neytron

B) yadrodan va manfiy zaryadlangan elektrondan

C) yadro,proton

D) to'g'ri javob yo'q

23 / 25

Paskal qonunidan amalda qayerlarda foydalanadi?

A) to'g'ri javob yo'q

B) A, B javob to'g'ri.

C) Gidrovlik press, pnevmatik tormoz

D) Gidrovlik tormozlarda.

24 / 25

Yerning massasi qanchaga teng?

A) 5,98*10^24

B) 2*10^30

C) to'g'ri javob yo'q

D) 7,35*10^22

25 / 25

Kosmik kemani kim yaratdi?

A) Siyolkovskiy

B) to'g'ri javob yo'q

C) Y. A. Gagarin

D) Korolyov

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71%-85% 4 baho

56%-70% 3 baho

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8-sinf Fizika 4-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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