Foydalanish uchun masalalar Ikkita nuqtaviy q

Foydalanish uchun masalalar
1.Ikkita nuqtaviy q₁=9q va q₂₌q zaryadlar orasidagi masofa R=8 sm.Zaryadlar yotadigan to’g’ri chiziq bo’ylab,birinchi zaryaddan qanday x masofada joylashgannuqtada berilgan zaryadlar hosil qilgan elektr maydon kuchlanganligi nolga teng.
Berilgan Formula Yechish
q₁=9q E=kq/r² _­­­9q/q=(x/(8-x))²
q₂₌q E₁=kq₁/x² 9=x/(8-x)
R=8 sm E₂=kq₂/(r-x)² 72-9x=x
E_n=0 q₁/q₂=(x/(r-x))² 10x=72
X=? x=7.2sm
2.Diametri 20sm bo’lgan va 10V potensialgacha zaryadlangan sharning sirt zichligi topilsin.
Berilgan Formula Yechish
d=20sm ꝺ=q/S=CႴ/S ꝺ=8.85*10^-12*10/0.2=
Ⴔ=10V ꝺ=Ꜫ₀Ⴔ/d =4.425*10^-10C/m²
ꝺ=?

3.Oraliq masofasi 5*10^-3m bo`lgan yassi kondensator plastinkalari orasiga Ⴔ=90V potensial qo`yilgan.Plastinkalardagi zaryad miqdori 10^-7C.Plastinkalar yuzasi aniqlansin.

Berilgan Formula Yechish
d=5*10^-3m C=Ꜫ₀S/d=q/Ⴔ S=10^-7*5*10^-3/
Ⴔ=90V S=qd/Ꜫ₀Ⴔ 8.85*10^-12*90=
q=10^-7C =0.63m²
S=?
4.E.Yu.K. 1.1V va ichki qarshiligi 10 ᾨ ga teng manba 9 ᾨ
bo`lgan tashqi qarshilikka ulangan.Zanjirdagi tok kuchi I va tashqi zanjirdagi kuchlanish tushuvi U topilsin.
Berilgan Formula Yechish
Ꜫ=1.1V I=Ꜫ/(r+R) I=1.1/(9+10)=1.1/19 A
r=10 ᾨ U=IR U=1.1/19 A*9 ᾨ=9.9/19V
R=9 ᾨ =0.5 V
I=?
U=?