Video lectures from the iCS group @ IIT Madras

EC1010: Electrical and Magnetic Circuits(Jan.-May 2012)

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Instructor: Nagendra Krishnapura

This is a course on circuit analysis. Problem sets and other instructions can be found here. Familiarity with basic calculus is assumed. At IIT Madras, this is a prerequisite course for Networks and Systems and Analog Circuits.

The lectures are also available in iPod format(320×240 video, AAC audio). Click on the link marked iPod next to each lecture to download these.


  1. 2012-01-02: Introduction to the course
  2. 2012-01-03(iPod): Current and Voltage; Kirchhoff's Current and Voltage laws
  3. 2012-01-05(iPod): Electrical circuit elements: Voltage and current sources; R, C, L, M
  4. 2012-01-06(iPod): Elements in series and parallel; Superposition in linear circuits
  5. 2012-01-09(iPod): Controlled sources; Energy and power in elements; Energy in a mutual inductor and constraint on mutual inductance
  6. 2012-01-10(iPod): Nodal analysis of a network with conductances and current sources; Setting up the equations; Conductance matrix; Superposition
  7. 2012-01-11(iPod): Nodal analysis with voltage sources and controlled sources; Modified nodal analysis
  8. 2012-01-12(iPod): Modified nodal analysis with controlled sources; Loop analysis
  9. 2012-01-13(iPod): Loop analysis with link currents as variables; Loop analysis for planar circuits(Mesh analysis) with mesh currents as variables
  10. 2012-01-17(iPod): Substitution theorem; Thevenin's theorem
  11. 2012-01-23(iPod): Thevenin's theorem; Norton's theorem; Pushing a voltage source through a node; Splitting a current source; Tellegen's theorem
  12. 2012-01-24(iPod): Tellegen's theorem; Reciprocity theorem
  13. 2012-01-25(iPod): Compensation theorem; Maximum power transfer theorem; Circuits with nonlinear components
  14. 2012-01-31(iPod): Two port parameters
  15. 2012-02-02(iPod): Negative feedback
  16. 2012-02-03(iPod): Opamp for realizing negative feedback circuits; Determining opamp signs for negative feedback
  17. 2012-02-06(iPod): Determining opamp signs for negative feedback; Circuits using opamps
  18. 2012-02-07(iPod): Opamp amplifiers; Two port representations(cont'd); RC circuit natural response; First order differential equation
  19. 2012-02-09(iPod): Step response of RC circuits; Response of a first order circuit to exp(st)
  20. 2012-02-10(iPod): Sinusoidal steady response of RC circuits; RL circuits
  21. 2012-02-14(iPod): Step response of RC/RL circuits
  22. 2012-02-16(iPod): Series RLC circuit; Second order differential equation; Natural response
  23. 2012-02-17(iPod): Second order system natural response and step response; AC signal measures; Sinusoidal steady state analysis
  24. 2012-02-21: Quiz II discussion
  25. 2012-02-23: Quiz II review
  26. 2012-02-28(iPod): Sinusoidal steady state analysis; Phasors
  27. 2012-02-29(iPod): Sinusoidal steady state response of first order(RC) and second order(series RLC) circuits
  28. 2012-03-01(iPod): Series and parallel RLC circuits; Concept of complex power
  29. 2012-03-02(iPod): Complex power, Apparent power, Reactive power, Power factor, Power factor correction; Conjugate matching for maximum power transfer
  30. 2012-03-05(iPod): Locus diagrams
  31. 2012-03-09(iPod): Active and reactive power; Introduction to three phase supply
  32. 2012-03-13(iPod): Coupled inductors; Ideal transformer
  33. 2012-03-15(iPod): Three phase circuits; Star to Delta transformation; Real and reactive power with a balanced three phase load
  34. 2012-03-16(iPod): Symmetrical component representation of unbalanced three phase components; Power measurement
  35. 2012-03-20(iPod): Two wattmeter method for three phase power measurement; Magnetic circuits-Basics of magnetic field, MMF and flux
  36. 2012-03-22(iPod): Flux density in a single loop; Solenoid; Solenoid with a ferromagnetic core
  37. 2012-03-26(iPod): Magnetic circuits with loops of ferromagnetic material; Inductance of a coil with a ferromagnetic core loop; Core nonlinearity, hysteresis
  38. 2012-03-27(iPod): Magnetic circuits; Transformer with a ferromagnetic core; Hysteresis loss
  39. 2012-03-29(iPod): Eddy current loss and its minimization; Magnetic circuits miscellania
  40. 2012-03-30(iPod): Switched capacitor as a resistor; Obtaining a dc voltage from another dc source
  41. 2012-03-31: DC-DC buck converter (no recording)
  42. 2012-04-10(iPod): DC-DC buck converter; Output voltage ripple
  43. 2012-04-17: Quiz IV discussion; Course summary

Problem sets


  1. 2012-01-30: Quiz I
  2. 2012-02-20: Quiz II
  3. 2012-03-12: Quiz III
  4. 2012-04-16: Quiz IV