Principles of operation and characteristics of DC machines, Transformers (single and three phase ) ,Synchronous machines, three phase and single phase induction motors. Introduction to AC circuits – waveforms and RMS value – power and power factor, single-phase and three-phase balanced circuits – Three-phase loads - housing wiring, industrial wiring, materials of wiring Basic circuit components -, Ohms Law - Kirchoff‘s Law – Instantaneous Power – Inductors - Capacitors – Independent and Dependent Sources - steady-state solution of DC circuits - Nodal analysis, Mesh analysis- Thevinin‘s Theorem, Norton‘s Theorem, Maximum Power transfer theorem- Linearity and Superposition Theorem.