5.1 Introduction5.2 Position of One-Link Robot as a Complex Number5.3 Impedance of R, L, and C as a Complex Number5.4 Impedance of a Series RLC Circuit5.5 Impedance of R and L Connected in Parallel5.6 Armature Current in a DC Motor5.7 Further Examples of Complex Numbers in Electric Circuits5.8 Complex ConjugateProblems