8-sinf Fizika Olimpiada

14. Elektr maydon kuchlanganligi formulasini belgilang?
A) F = E ∙ q₀ В) E =  С) E =  D) C=q/U
15. Ampermetr zanjirga qanday ulanadi ?
A) Parallel B) Ketma-ket C) Aralash ulanadi D) Parallel yoki ketma-ket
16. Elektr kuchlanish formulasini belgilang
A) A = U ∙q B) U = A/q C) E =eU D) C=q/U
17. Kuchlanishni o’lchash uchun qaysi asbobdan foydalaniladi ?
A) Dinamometr B) Ampermetr C) Voltmetr D) Elektrometr
18. Rezistor so’zining ma’nosi nima?
A) qarshilik B) yorug’lik C) yo’l D) qo’zg’almas
19. 1,5 V li 4 ta galvanik elementni ketma-ket ulab necha voltli manba hosil qilish mumkin ?
20. O’tkazgichda elektr toki vujudga kelishi uchun ___________ maydon mavjud bo’lishi kerak
21. O’tkazgichning elektr qarshiligi uning uzunligiga ____________ proporsional
22. Atom qanday zarralardan tuzilganligini yozing
23. Kuchlanishni o’lchovchi asbobni yozing _______________
24. Tok kuchini aniqlash formulasini yozing ___________________
25. Elektr qarshilikni topish formulasini yozing
8-sinf Fizika Olimpiada
1 . Tok kuchini hisoblash formulasini aniqlang .
A) U=A/q B) I= q/t C) C=C₁+C₂ D) E=F/q₀
2. Tok kuchini 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^-19 С)1,6 ∙10¹⁹ D) 9 ∙ 10^-31
4. Quyidagi zarralarning qaysi biri manfiy zaryadga ega ?
A) Elektron B) Proton C) Neytron D) Yadro
5. Gapni to'ldiring: "Zaryadli zarralarning o'tkazgich bo'ylab ozgarmas miqdordagi oqimi ….. deb atatladi."
A) o'zgarmas tok B) elekt toki C) o'zgaruvchan tok D) elektr zaryadi