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8-sinf Fizika 4-chorak

InfoMaster

May 5, 2021

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8-sinf Fizika 4-chorak

Testni Shirinboyev Temurbek tayyorladi.

Ma'lumotlaringizni kriting.

IsmTelefon raqami

1 / 25

1Vatt.soat necha Jaulga teng ?

A) 360 J

B) 3600 J

C) 5000 J

D) 5600 J

2 / 25

Bug’ mashinasini kim kashf etgan ?

A) Volta

B) Amper

C) Jems Uatt

D) Kulon

3 / 25

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

A) Ion bog’lanish

B) Galvonaplastina

C) Galvonastegiya

D) eletrlolez

4 / 25

Elektr tokining bajargan ishini formulasini ko’rsating toping ?

A) R=UI

B) Q=I^2RT

C) A=UIT

D) J=q/t

5 / 25

220 V kuchlanishda 0,25 A tok olib yonayotgan elektr lampochkadagi tokning quvvatini toping ?

A) 55 W

B) 550 W

C) 500 W

D) 5,5 W

6 / 25

Bitta atom massasini topish formulasini ko’rsating ?

A) N=mn∆z

B) ν=m/µ

C) m=µ/N

D) to'g'ri javob yo'q

7 / 25

Ionlar orasida Kulon kuchi tufayli vijudga keladigan kimyoviy bog’lanish……deb ataladi?

A) Elektrolitlar

B) Kovalent bog’lanish

C) Qutbli bog’lanish

D) Ionli bog’lanish

8 / 25

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

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

A) 0,4

B) 0.017

C) 0,098

D) 0.5

9 / 25

Xonadonlardagi elect tarmog’ining kuchlanishi nechaga teng?

A) 1,5 V

B) 220 V

C) 500 kV

D) 5V

10 / 25

Uyali telefon iste'mol qiladigan tok kuchi qanchaga teng ?

A) 0,2 A

B) 0,5 A

C) 0,1 A

D) 0.4 A

11 / 25

Elektr qarshiligi qaysi harf bilan belgilanadi?

A) R

B) L

C) U

D) J

12 / 25

Elekt kuchlanishi formulasi berilgan javobni ko’rsating.

A) I=q/t

B) F=kq/r^2

C) U=A|q

D) E=U/d

13 / 25

Uzunligi 1 m, ko’ndalang kesimining yuzi 0,4 mm² bo’lgan nikelin simning uchlaridagi kuchlanish 2 V gat eng. Shu elektr zanjir orqali o’tayotgan tok kuchini aniqlang?

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

A) 0,8 A

B) 9 A

C) 2 A

D) 4 A

14 / 25

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

A) Elektroskop

B) spedometr

C) Areometr

D) Barametr

15 / 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) 5,4*10‾⁴ N

C) 2*10‾⁸ N

D) 5*10‾⁸ N

16 / 25

Elektr sig’imining o’lchov birligi nima ?

A) Kulon

B) Farad

C) amper

D) Sekund

17 / 25

Bitta elektron massasi nechaga teng ?

A) 1,6*10^-19kg

B) 8,81*10^-19kg

C) 9,1*10^-31kg

D) 3,36*10^-32kg

18 / 25

bu shartli belgi qanday nomlanadi?

A) Qo’ng’iroq

B) Tok manbayi

C) O’tkazgichlarning tutashtirmasdan kesishishi

D) Kalit

19 / 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) 0.4 Ω

B) 0.5 Ω

C) 1 Ω

D) 0.2 Ω

20 / 25

Shoyi matoga ishqalangan shisha tayoqcha qanday ishorada elektrlanib qoladi?

A) Manfiy

B) Elektrlanmaydi

C) Musbat

D) to'g'ri javob yo'q

21 / 25

Qarshiliklari 200 Ω va 300 Ω bo`lgan ikkita elektr lampa parallel ulanib, 240 V tarmoqqa kiritilgan. Umumiy tok kattaligini toping.

A) 1.8 A

B) 2 A

C) 4 A

D) 5 A

22 / 25

Jism impulsi birligini ko'rsating

A) m/s^2

B) N*S

C) kg*m/s

D) kg

23 / 25

Quyidagi formulalardan qaysi biri kuch momentini formulasi.

A) F=mg

B) v=s/t

C) M=FL

D) M=F/L

24 / 25

Paskal qonuni ta'rifini ko'rsating

A) Suyuqlik o'ziga berilgan tashqi bosimni hamma tomonga ozgarishsiz uzatadi

B) Suyuqlik va gaz o'ziga berilgan tashqi bosimni hamma tomonga uzgarishsiz uzatadi.

C) Gaz zarrachalarining idish devorlariga bosimi hamma tomonga o'zgarishsiz uzatadi.

D) hamma javoblar to'g'ri

25 / 25

Zaryadlar qanday o'zaro ta'sirlashadi?

A) hamma zaryadlar tortiladi

B) to'g'ri javob yo'q

C) bir xil ishorali zaryadlar itarishadi, har xil ishoraki zaryadlar tortiladi

D) hamma zaryadlar tortiladi va itarishadi

Baholash mezoni

86%-100% 5 baho

71%-85% 4 baho

56%-70% 3 baho

55% va kamiga 2 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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