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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

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

A) Nuqtaviy zaryad

B) Manfiy zaryad

C) Elementar zaryad

D) Musbat zaryad

2 / 25

Atom so’zining ma’nosi nima ?

A) Musbat zaryad

B) Elektr zaryat

C) Bo’linmas

D) Zaryad

3 / 25

Akkumulator so’zining ma’nosi nima ?

A) Tok manbayi

B) Zaryad oqimi

C) Zaryadlovchi

D) To’plovchi

4 / 25

bu shartli belgi qanday nomlanadi?

A) O’tkazgichlarning tutashtirmasdan kesishishi

B) Tok manbayi

C) Kalit

D) Qo’ng’iroq

5 / 25

Kuchlanishni o'lchash uchun qanday asbobdan foydalaniladi?

A) Elektroskop

B) Dinamometr

C) hamma javoblar to'g'ri

D) voltmetr

6 / 25

Kuch impulsini topish formulasini ko'rsating?

A) P=m*v

B) F=m*a

C) I=F*t

D) F=m*g

7 / 25

Atom qanday zaryadlardan tuzilgan?

A) proton,neytron

B) yadrodan va manfiy zaryadlangan elektrondan

C) to'g'ri javob yo'q

D) yadro,proton

8 / 25

Birinchi kosmik tezlik qanchaga teng?

A) 11,1 km/s

B) 11,2 km/s

C) 8,4km/s

D) 7,9 km/s

9 / 25

Suyuqlik oqimining tezligi bilan uning bosimi orasidagi miqdoriy bog'lanishni kim topdi?

A) Torichelli

B) Paskal

C) Bemueli

D) Arximet

10 / 25

Kosmik kemani kim yaratdi?

A) to'g'ri javob yo'q

B) Korolyov

C) Siyolkovskiy

D) Y. A. Gagarin

11 / 25

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

A) 50 N

B) 200 N

C) 100N

D) 20 N

12 / 25

220 V kuchlanishda 5 A tok olib ishlaydigan dazmolning quvvatini toping ?

A) 220 W

B) 100 W

C) 110W

D) 1,1 kW

13 / 25

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

A) Galvonaplastina

B) eletrlolez

C) Galvonastegiya

D) Ion bog’lanish

14 / 25

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

A) Joul

B) Ersted

C) Amper

D) Volta

15 / 25

Bitta atom massasini topish formulasini ko’rsating ?

A) ν=m/µ

B) N=mn∆z

C) m=µ/N

D) to'g'ri javob yo'q

16 / 25

1Vatt.soat necha Jaulga teng ?

A) 5600 J

B) 5000 J

C) 360 J

D) 3600 J

17 / 25

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

A) Elektrolitlar

B) Ionli bog’lanish

C) Kovalent bog’lanish

D) Qutbli bog’lanish

18 / 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) 4 A

B) 2 A

C) 0,8 A

D) 9 A

19 / 25

Elekt kuchlanishining ulchov birligi nima?

A) Sekund

B) Volt

C) Amper

D) Kulon

20 / 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) 20 Ω

D) 44.4 Ω

21 / 25

Elektr zanjiridagi lampochkadan 5 minutda 30 C zaryad o’tgani ma’lum. Zanjirdagi ampermetr lampochkadan qancha tok o’tayotganini ko’rsating?

A) 0,5 A

B) 6 A

C) 0,4 A

D) 0,1 A

22 / 25

Elektr qarshiligi qaysi harf bilan belgilanadi?

A) J

B) L

C) U

D) R

23 / 25

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

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

A) 0,4

B) 0,098

C) 0.5

D) 0.017

24 / 25

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

A) 15 V

B) 12 V

C) 25 V

D) 3 v

25 / 25

Kuchlanishni o’lchaydigan asbob nima diyeladi?

A) ampermetr

B) elektroskop

C) elektrometr

D) voltmeter

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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5-sinf Matematika 4-chorak

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