NETWORK THEORY(18EC32)

NETWORK THEORY

Course Code:18EC32 CIE Marks:40 Number of Lecture Hours/Week:03 + 2 (Tutorial)
SEE marks:60 Exam Hours:03 CREDITS – 04

Course Learning Objectives: This course will enable students to:

•Describe basic network concepts emphasizing source transformation, source shifting, mesh and nodal techniques to solve for resistance/impedance, voltage, current and power.
•Explain network Thevenin‘s, Millman‘s, Superposition, Maximum Power transfer and Norton‘s Theorems and apply them in solving the problems related to Electrical Circuits.
•Explain the behavior of networks subjected to transient conditions.
•Use applications of Laplace transforms to network problems.
•Study two port network parameters like Z, Y, T and h and their inter-relationships and applications. •Study of RLC Series and parallel tuned circuit.

Module – 1

Basic Concepts: Practical sources, Source transformations, Network reduction using Star – Delta transformation, Loop and node analysis with linearly dependent and independent sources for DC and AC networks.

Module – 2

Network Theorems:
Superposition, Millman‘s theorems, Thevinin‘s and Norton‘s theorems, Maximum Power transfer theorem.

Module – 3

Transient behavior and initial conditions: Behavior of circuit elements under switching condition and their Representation, evaluation of initial and final conditions in RL, RC and RLC circuits for AC and DC excitations.

Module – 4

Laplace Transformation & Applications: Solution of networks, step, ramp and impulse responses, waveform Synthesis.

Module – 5

Two port network parameters: Definition of Z, Y, h and Transmission parameters, modelling with these parameters, relationship between parameters sets.
Resonance:
Series Resonance: Variation of Current and Voltage with Frequency, Selectivity and Bandwidth, Q-Factor, Circuit Magnification Factor, Selectivith with Variable Capacitance, Selectivity with Variable Inductance.
Parallel Resonance: Selectivity and Bandwidth, Maximum Impedance Conditions with C, L and f Variable, current in Anti-Resonant Circuit, The General Case-Resistance Present in both Branches.

Course Outcomes: At the end of the course, the students will be ableto

•  Determine currents and voltages using source transformation/ source shifting/ mesh/ nodal analysis and reduce given network using star-delta transformation/source transformation/ source shifting.
•  Solve network problems by applying Superposition/ Reciprocity/ Thevenin‘s/ Norton‘s/ Maximum Power Transfer/ Millman‘s Network Theorems and electrical laws to reduce circuit complexities and to arrive at feasible solutions.
•  Calculate current and voltages for the given circuit under transient conditions
•  Apply Laplace transform to solve the given network.
•  Solve the given network using specified two port network parameter like Z or Y or T or h.  Understand the concept of resonance

Question paper pattern:

 Examination will be conducted for 100 marks with question paper containing 10 full questions, each of 20 marks.  Each full question can have a maximum of 4 sub questions.
 There will be 2 full questions from each module covering all the topics of the module.
 Students will have to answer 5 full questions, selecting one full question from each module.  The total marks will be proportionally reduced to 60 marks as SEE marks is 60.

Text Books:

1. M.E. Van Valkenberg (2000), ?Network analysis?, Prentice Hall of India, 3rdedition, 2000, ISBN: 9780136110958. 2. Roy Choudhury, ?Networks and systems?, 2nd edition, New Age International Publications, 2006, ISBN: 9788122427677

Reference Books:

1. Hayt, Kemmerly and Durbin ?Engineering Circuit Analysis?, TMH 7th Edition, 2010.
2. J. David Irwin /R. Mark Nelms, ?Basic Engineering Circuit Analysis?, John Wiley, 8thed, 2006.
3. Charles K Alexander and Mathew N O Sadiku, ? Fundamentals of Electric Circuits?, Tata McGraw-Hill, 3rd Ed, 2009.