Step 1: Conductance.
Resistance (\(R\)) opposes current; conductance is ease of current flow.
\[
G = \frac{1}{R}
\]
Step 2: Cell constant.
In a conductivity cell:
\[
\text{Cell constant} = \frac{l}{A}
\]
where \(l\) = distance between electrodes, \(A\) = electrode area.
Step 3: Importance.
Cell constant helps to convert measured conductance into specific conductance.