#StartUvod
|
\vskip-2.9mm\noindent
|
\begin{tabular}{lr}
|
\begin{minipage}[t]{0.5\textwidth}
|
Na vi"sini $h=/*/h/*/\mathrm{m}$ nad nevtralno prevodno podlago
|
se nahajata prema vodnika polmera $r_0=/*/r0/*/$m z nabojem $\pm q=/*/q/*/$C.
|
Razdalja med njima je $d=/*/d/*/$m.
|
\end{minipage}
|
\hskip0.01\textwidth
|
\begin{minipage}[t]{0.4\textwidth}
|
\vskip-5mm
|
\begin{tikzpicture}[scale=0.7]
|
\fill[color=black] (0,2) circle (0.2);
|
\fill[color=black] (4,2) circle (0.2);
|
\node[above] at (0.4,2) {$-q$};
|
\node[above] at (4.4,2) {$+q$};
|
\draw [dashed,stealth-stealth] (-1,0) -- (-1,2);
|
\draw [dashed,stealth-stealth] (0,0.5) -- (4,0.5);
|
\draw [dotted] (0,0) -- (0,3);
|
\draw [dotted] (-1.5,2) -- (5.5,2);
|
\draw [dotted] (4,0) -- (4,3);
|
\fill[color=black!20] (-3.0,0) -- (8.5,0) -- (8.5,-0.8) -- (-3.0,-0.8);
|
\node[left] at (-1,1) {$h=/*/h/*/$m};
|
\node[above] at (2,0.5) {$d=/*/d/*/$m};
|
\end{tikzpicture}
|
\end{minipage}
|
\end{tabular}
|
#EndUvod
|
%\node[below] at (4,0) {A};
|
%\node[below] at (8,0) {B};
|
%\fill[color=black] (4,0) circle (0.05);
|
%\fill[color=black] (8,0) circle (0.05);
|
%\draw [dashed,stealth-stealth] (4,0.5) -- (8,0.5);
|
%\node[above] at (6,0.5) {$d=/*/d/*/$m};
|
|
|
#StartPodnaloga
|
Izra"cunajte absolutno vrednost napetosti med vodnikoma.
|
#EndPodnaloga
|
|
#StartRezultat
|
TeX: U
|
izpis: eng 3
|
enota: V
|
formula: eps0=8.854e-12;D=sqrt(d^2+4*h^2);U=q*log(2*h*d/(r0*D))/pi/eps0;U
|
napacna: pi*eps0/log(2*h*d/(r0*D))/q^2
|
napacna: 2.1*U
|
napacna: U/2.1
|
#EndRezultat
|
eps0=8.854e-12;D=sqrt(d^2+4*h^2);U=q*log(2*h*d/(r0*D))/pi/eps0;U
|
pi*eps0/log(2*h*d/(r0*D))/q
|
log(2*h*d/(r0*D))/pi/eps0
|
|
|
#StartPodnaloga
|
Kolik"sna je kapacitivnost dvovoda na enoto dol"zine?
|
#EndPodnaloga
|
|
|
|
#StartRezultat
|
TeX: c
|
izpis: sci 3
|
enota: F/m
|
formula: eps0=8.854e-12;D=sqrt(d^2+4*h^2);c=pi*eps0/log(2*h*d/(r0*D));c
|
napacna: 2.4869128*c
|
napacna: 0.84128*c
|
napacna: 0.6838*c
|
napacna: 1.376*c
|
napacna: 19.14869128*c
|
#EndRezultat
|
|
|
#StartSkalar
|
ime: d
|
izpis: sci 1
|
nacin: FixedVals 4 5 6
|
#EndSkalar
|
|
#StartSkalar
|
ime: h
|
izpis: sci 1
|
nacin: FixedVals 1 2 3
|
#EndSkalar
|
|
#StartSkalar
|
ime: r0
|
izpis: dec 3
|
nacin: FixedVals 5e-3 6e-3 8e-3
|
#EndSkalar
|
|
|
#StartSkalar
|
ime: q
|
izpis: sci 1
|
nacin: FixedVals 5e-9 6e-9 7e-9 8e-9
|
#EndSkalar
|
