Which of the following statements is false ?

Question

$\begin{array}{1 1} \text{(1) Wheatstone bridge is the most sensitive when all the four resistances are of the same order of magnitude.} \\ \text{(2) In a balanced wheatstone bridge if the cell and the galvanometer are exchanged, the null point is disturbed.} \\\text{(3)A rheostat can be used as a potential divider.} \\\text{(4)Kirchhoff’s second law represents energy conservation.} \end{array}$