Courses » Basic Electrical Circuits

Basic Electrical Circuits


Electrical circuits are everywhere, from tiny ones in integrated circuits in mobile phones and music players, to giant ones that carry power to our homes. This course deals with analysis techniques that can be applied to all such circuits. We'll first discuss electrical quantities-voltage and current-relevant to such circuits and learn about basic elements(R, L, C, controlled sources) and their properties. We'll then move on to general analysis techniques that can be applied to arbitrary circuits. We'll also discuss circuit theorems and rudiments of negative feedback circuit using the opamp. After taking this course, one should be able to analyze memoryless linear circuits.

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Final Exam (in-person, invigilated, currently conducted in India) is mandatory for Certification and has INR Rs. 1100 as exam fee


XII std. level algebra and calculus, electrostatics


We will have a total of 8 weeks for this course. There will be about 2.5 hours of lecture per week. This course is aimed at 1st and 2nd year undergraduate college students. This is intended to be the first course on electrical circuits in an undergraduate curriculum.

17144 students have enrolled already!!


Nagendra Krishnapura is an associate professor in the VLSI group of the department of Electrical Engineering of the Indian Institute of Technology, Madras. He works in the area of analog and mixed-signal integrated circuits and signal processing.

He graduated with a Ph.D. from Columbia University, New York in Oct. 2000. He obtained his B. Tech. degree in Electronics and Communications Engineering from the Indian Institute of Technology, Madras, in 1996. Between 2000 and 2005, he worked as a senior design engineer at Celight, Inc. and Multilink(later Vitesse Semiconductor) where he designed integrated circuits for high speed communications. From 2003 to 2005, he was an Adjunct Assistant Professor and taught courses on Analog Circuit Design at Columbia University.

Week Unit Unit titles
1 1 Preliminaries; Current and voltage; Electrical elements and circuits; Kirchhoff's laws
1 2 Basic elements: Voltage and current sources, R, L, C, M; Linearity of elements
2 3 Elements in series and parallel
2 4 Controlled sources
3 5 Power and energy in electrical elements
3 6 Circuit Analysis Methods
4 7 Nodal analysis
4 8 Extending nodal analysis with different sources
5 9 Mesh analysis
5 10 Circuit theorems
6 11 More circuit theorems
6 12 Two port parameters
7 13 Two port parameters continued
7 14 Reciprocity in resistive networks
8 15 Opamp and negative feedback
8 16 Opamps cont'd: Example circuits and additional topics
9 17 First Order Circuits
9 18 First Order Circuits cont'd
10 19 First order circuits with time-varying inputs
10 20 Sinusoidal steady state response and total response
11 21 Second order system-Natural response
11 22 Second order system-Cont'd
12 23 Direct calculation of steady state response from equivalent components
12 24 Magnitude and Phase plots; Maximum power transfer theorem

  • The exam is optional for a fee.
  • Date of Exam: October 28,2018(Sunday)
  • Time of Exam: Morning session 9am to 12 noon; Afternoon session: 2pm to 5pm
  • Registration url: Announcements will be made when the registration form is open for registrations.
  • The online registration form has to be filled and the certification exam fee needs to be paid. More details will be made available when the exam registration form is published.


  • Final score will be calculated as : 25% assignment score + 75% final exam score
  • 25% assignment score is calculated as 25% of average of  Best 8 out of 12 assignments
  • E-Certificate will be given to those who register and write the exam and score greater than or equal to 40% final score. Certificate will have your name, photograph and the score in the final exam with the breakup.It will have the logos of NPTEL and IIT Madras.It will be e-verifiable at nptel.ac.in/noc.