# EC1010: Electrical and Magnetic Circuits(Jan.-May 2013)

• CRC101

## Schedule

A slot(Mo 8am, Tu 1pm, Th 11am), F slot(Fr 8am)

## Evaluation

There will be four quizzes(Feb 8, Feb 25, Apr 1, Apr 22) and an end semester exam. The quizzes will count for 50-60% of the grade and the end semester exam for the remaining 40%. Tutorials held periodically will count for up to 10% of the grade.

## Recorded lectures

The recorded lectures are available here. You can also find lectures from previous years at the same link. The introductory lecture has information on prerequisites and references.

## Tutorials

Problem sets will be posted below. You are expected to solve them on your own. You can approach the teaching assistants for clarifications and help. You should work each one before the corresponding tutorial session dates given below. Solve the problems cleanly in a notebook showing the steps clearly and show it to the TAs during tutorial sessions.

1. Problem set 1(1st Feb. 2013): Basic elements; Nodal analysis; Modified nodal analysis
2. Problem set 2(11th Feb. 2013): Circuit theorems
3. Problem set 3(25th Feb. 2013): Circuit theorems; Two ports; Nonlinear circuits
4. Problem set 4(16th Mar. 2013): Opamp circuits
5. Problem set 5(22nd Mar. 2013): RC, RLC network response, differential equations
6. Problem set 6(8 Apr. 2013): Sinusoidal steady state analysis, phasor diagrams, Bode plots
7. Problem set 7(15 Apr. 2013): Locus diagrams, 3 phase systems
8. Problem set 8(26 Apr. 2013): Magnetic circuits, transformers

## Objectives

• Understand the behavior of basic circuit elements
• Understand basic laws applicable to all circuits
• Learn circuit analysis methods applicable to all linear circuits

After taking this course, one should be able to analyze any circuit(=write down the equations for the circuit and solve them) with linear elements with ideal voltage and current sources and opamps.

## Syllabus

Current and voltage; Kirchhoff's current and voltage laws; Basic elements R, L, C, M; Power and energy; Nodal analysis; Mesh analysis; Circuit theorems; Incremental analysis of nonlinear circuits; Negative feedback and ideal opamp; First and second order circuits and corresponding differential equations; Forced and natural response; Step response; Sinusoidal steady state response; Phasor diagrams; Bode plots; 3 phase systems; Magnetic circuits-magnetic analogs of KVL and KCL; Hysteresis loops

## Text book

• Hayt, Kemmerly, and Durbin, Engineering Circuit Analysis, 7th Edition, McGraw Hill 2006.

## References

• DeCarlo and Lin, Linear Circuit Analysis, 2nd Edition, Oxford University Press 2001.
• SC Dutta Roy, Circuit Theory, NPTEL video lectures: http://nptel.iitm.ac.in/video.php?subjectId=108102042
• Modified Nodal Analysis: The following links describe nodal and modified nodal analysis. The first link also shows the MNA stamps for common elements.

## Pre-requisites

• High school algebra and calculus; Basic electrostatics

## Attendance

Attendance will be strictly enforced and those falling short will not be permitted to write the end sem exam. TAs will go around the room taking attendance at the beginning of the class. If you are more than 5 min. late, please do not enter the classroom.