In the circuit shown in figure below, calculate (i) the current flowing through the arms AB, AC and CDE; (ii) the potential difference across AB, CD and DE.

 (i) Current through AB = = 0.125 A
   Current through AC is given by the resistors 6Ω and 4Ω , hence
                    = 0.15 A
   Current through CDE = = 0.15 A
(ii) Potential difference across AB = IR = 0.125 × 12
                                                       = 1.5 V
    Potential difference across CD = 0.15 × 6 = 0.9 V
    Potential difference across DE = 0.15 × 4 = 0.6 V