Question

Conductivity of a solution is 6.23 x 10^-5  Ω^-1cm^-1 and its resistance is 13710Ω. If the electrodes are 0.7cm apart, calculate the cross-sectional area of electrode.

Answer 1

ross-sectional area of electrode:

${\displaystyle k=\frac{1}{R}\cdot \frac{l}{a}}$

${\displaystyle a=\frac{1}{R}\cdot \frac{l}{k}}$

${\displaystyle a=\frac{1}{13710}\cdot \frac{0.7}{6.23\cdot {10}^{-5}}}$

${\displaystyle a=0.82c{m}^2}$