In this application worksheet, we use Maple software to determine exact analytical solutions for the current flows through the different branches of the circuit known as Graëtz bridge. This circuit is used in electronics as full wave rectifier, it is formed by four non-ideal diodes and one diagonal resistance. Then, we derive analytical expressions for the voltages at the terminals of all elements in the circuit. Finally, we calculate the dynamical resistances of different diodes in the circuit. The proposed analytical solutions are all expressed as functions of the Lambert W function.