Se da:
m
d
p
U
I
r=?
Formule:
[tex]R= \frac{pl}{S} \\
R=\frac{U}{I} (1)\\
l=\frac{V}{S}(2)\\
Din(1)si(2)\\
\frac{U}{I}= \frac{pV}{S^{2}}\\
S^{2}= \frac{pVI}{U} \\
S= \pi r^{2}(3) \\
V= \frac{m}{d}(4)\\
Din(3)si(4)\\
\pi ^{2}r^{4}= \frac{pmI}{Ud}\\
r= \sqrt[4]{ \frac{pmI}{ \pi ^{2}Ud}} \\
Raspuns:d).[/tex]
