Derive the balancing condition of a wheatstone bridge.

State Kirchhoff's law for an electrical network. Using these laws deduce the conditions for balance in a wheatstone bridge.

The function of a salt bridge is

In a meter-bridge if the left and right gaps are connected with 2 Omega and 3 Omega resistances, respectively then the bridge is balanced. The resistance to be connected with 3 Omega resistance to get the balancing point at midpoint of the bridge wire is

A conductivity cell (X) employs two electrodes having surface area of 10 cm^(2) and separated by a distance of 10 cm. It is filled with 0.01M solution of an electrolyte and connected in the wheatstone bridge. The balanced bridge is shown in the diagram . What is the molar conductivity of the electrolyte ?