Electrical and Electronic Principles 3: Checkbook, Second Edition provides an introduction to basic electrical principles. The book presents problems and worked examples to establish and exemplify electronic theories. The text first discusses circuit theorems, and then proceeds to tackling single-phase series and parallel a.c. circuits. The fourth chapter covers the three-phase systems, while the fifth and sixth chapters tackle d.c. transients and machines. The next chapter provides an introduction to three-phase induction motor. The remaining chapters cover modulation, measurement, simple filter, and attenuation circuits. The book will be most useful to undergraduate students of electronics related discipline, such electrical engineering. Practitioners and professionals will also benefit from the book.