Fundamental concepts and units, Circuit variables and elements: voltage, current, power, energy, independent and dependent sources, resistance. Basic laws: Ohm’s law, Kirchoff’s current and voltage laws. Simple resistive circuits: series and parallel circuits, voltage and current division, wye-delta transformation. Techniques of circuit analysis: Nodal and mesh analysis including supernode and supermesh. Network theorems: Source transformation, Thevenin’s theorem, Norton’s theorem and superposition theorem with applications in circuits having independent and dependent sources, maximum power transfer condition and reciprocity theorem. Energy storage elements: Inductors and capacitors, series parallel combination of inductors and capacitors. Responses of RL and RC circuits: natural and step responses. Magnetic quantities and variables: Flux, permeability and reluctance, magnetic field strength, magnetic potential, flux density, magnetization curve. Laws in magnetic circuits: Ohm’s law and Ampere’s circuital law. Magnetic circuits: series, parallel and series- parallel circuits.