7-sinf 1-chorak uchun nazorat testi 1– variant 1

13. 10 m/s necha km/soat ga teng ? A) 90 B) 36 C) 54 D) 72
14. To’g’ri chiziqli tekis tezlanuvchan harakatda tezlanish qanday yo’nalgan ?
A) harakat yo’nalishi bilan bir xil B) harakat yo’nalishiga teskari
C) harakat yo’nalishiga tik D) tezlanish yo’nalishga ega emas
15. Jism boshlang’ich tezliksiz to’g’ri chiziqli tekis tezlanuvchan harakatlanganda tezligi qaysi formuladan aniqlanadi ?
A) v=v₀+at B) v=v₀+gt C) v=v₀+at/2 D) v=at
8-sinf 1-chorak uchun nazorat testi
1 – variant
1 . Tok kuchini husoblash formulasini aniqlang .
A) U=A/q B) I= q/t C) C=C₁+C₂ D) E=F/q₀
2. Kuchlanishni o’lchash uchun qaysi asbobdan foydalaniladi ?
A) Dinamometr B) Ampermetr C) Voltmetr D) Elektrometr
3. Eng kichik ( elementar ) zaryad miqdori nimaga teng ( C ) ?
A) 1,9∙10^-16B) 1,6 ∙ 10^-19С)1,6 ∙10¹⁹ D) 9 ∙ 10^-31
4. Quyidagi zarralarning qaysi biri manfiy zaryadga ega ?
1.Elektron 2.Proton 3.Neytron 4.Yadro
A) 1 B) 2 C) 3 D) 4
5. Gapni to'ldiring: "Zaryadli zarralarning o'tkazgich bo'ylab o’zgarmas miqdordagi oqimi ….. deb atatladi."
A) o'zgarmas tok B) elekt toki C) o'zgaruvchan tok D) elektr zaryadi
6. Kulon qonuni formulasini belgilang
A) F = k B) F = k C) F = G D) E = F/q₀
7. 400 mA necha A ga teng ?A) 0, 004 B) 400 C) 4 D) 0,4
8. Eng sodda elektr zanjiri tarkibiga quyidagilardan qaysilari kiradi ?:
1. Tok manbai 2.O’tkazgich 3. Elektr iste’molchi 4. Kalit
A) 1, 3, 4 B) 2, 3, 4 C) 1, 2, 4 D) 1, 2, 3, 4
9. Metallarda elektr tokini qanday zarralarning hosil qiladi ?
A) Musbat ionlar B) Musbat ionlar va erkin elektronlar
C) Elektr maydoni ta’sirida erkin elektronlarning harakati
D) Atom yadrolarining harakati