(કોપરની અવરોધકતા $=1.7 \times 10^{-8}\, \Omega \,{m}$, એલ્યુમિનિયમની અવરોધકતા $=2.6 \times 10^{-8}\, \Omega \,{m}$ લો)
\(R=\frac{R_{1} R_{2}}{R_{1}+R_{2}}=\frac{\ell}{A} \cdot \frac{\rho_{1} \rho_{2}}{\rho_{1}+\rho_{2}}\)
\(R=\frac{25 \times 10^{-2}}{3 \times 10^{-6}} \times \frac{1.7 \times 2.6 \times 10^{-16}}{4.3 \times 10^{-8}}\)
\(R=0.858\, {m}\, \Omega\)