1.3.

R = \frac{ρ l}{S}

${ R = \frac {\rho l} {S}}$

R = \frac{ρ l}{S}

$R = \frac {\rho l} {S}$

R (Ω)

$R \;\left(Ω\right)$

ρ

$\rho$

ρ

$\rho$

1

l

$l$

m

$m$

1

S

$S$

m^{2}

$m^2$

1

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