**Unit 1: Elementary Concepts**

Prerequisite : Concepts of emf, potential difference, current and resistance, Ohm's Law, effect of temperature on resistance , resistance temperature coefficient, insulation resistance, S.I. Units of Work, power and energy, Conversion of energy from one form to another in electrical, mechanical and thermal systems.

**Unit 2 Electromagnetism**

Magnetic effect of an electric current, cross and dot conventions, right hand thumb rule and cork screw rule , nature of magnetic field of long straight conductor, solenoid and toroid. Concept of m.m.f, flux, flux density, reluctance, permeability and field strength, their units and relationships, Simple series and parallel magnetic circuits, comparison of electrical and magnetic circuit, force on current carrying conductors placed in magnetic field, Fleming's left hand rule.

Farady's laws of electromagnetic induction, Fleming's right hand rule rule , statistically and dynamically induced e.m.f, self and mutual induction, coeffecient of coupling , energy stored in magnetic field.

**Unit 3 : Single Phase Transformers and Electrostatics**

A) Single phase transformers : Construction, principle of working , e.m.f equation, voltage and current ratios, losses, definition of regulation and efficiency, determination of these by direct loading method. Descriptive treatment of autotransformers.

B) Electrostatics : Electrostatic field, electric flux density, electric field strength, absolute permittivity, relative permittivity and capacitance. Capacitor, composite dielectric capacitors, capacitors in series and parallel, energy stored in capacitors, charging and discharging of capacitors (no derivation) and time constant.

**Unit 4 : AC Fundamentals**

Sinusoidal voltages and currents, their mathematical and graphical representation, concept of cycle, period, frequency, instantaneous, peak (maximum), average and r.m.s values, peak factor and form factor. Phase difference, lagging, leading and in phase quantities and phasor representation. Rectangular and polar representation of phasors.

Study of A.C. circuits consisting of pure resistance, pure inductance, pure capacitance and corresponding voltage- current phasor diagrams, voltage-current and power waveforms.

**Unit 5: Single phase A.C. Circuits and Polyphase A.C. Circuits**

A) Single phase A.C. Circuits Study of series and parallel R-L, R-C, R-L-C circuits, concept of impedance, admittance in case of above combinations, wave form and relevant voltage- concept of active, reactive , apparent, complex power and power factor, resonance in series RLC circuit.

B) Polyphase A.C. Circuits : Concept of three-phase supply and phase sequence, balanced and unbalanced and unbalanced load, voltages, currents and power relations in three phase balanced star connected loads and delta-connected loads along with phasor diagrams.

**Unit 6 : D. C. Circuits**

Classification of electrical networks, Kirchoff's laws and their applications for network solutions using loop analysis, Simplifications of networks using series and parallel combinations and star - delta conversions. Energy sources - ideal and practical voltage and current source, Superposition theorems, Thevenin's theorem.