• Book Name: Electric Circuit Analysis
• Author: Suresh Kumar
• Pages:
• Size: 14 MB

The field of electrical and electronic engineering is vast and diverse. However, two topics hold the key to the entire field. They are ‘Circuit Theory’ and ‘Signals and Systems’. Both these topics provide a solid foundation for later learning, as well as for future professional activities.

This undergraduate textbook, the first of a two-book series, deals with one of these two pivotal subjects in detail. In addition, it connects ‘Circuit Theory’ and ‘Signals and Systems’, thereby preparing the student-reader for a detailed study of this important subject either concurrently or subsequently.

The theory of electric circuits and networks, a subject derived from the more basic subject of electromagnetic fields, is the cornerstone of electrical and electronics engineering. Students need to master this subject and assimilate its basic concepts in order to become competent engineers.

However, this book was perceived as being too voluminous and too comprehensive for a first-level course on Circuits. Hence, for better acceptability and better utilization of the content, I decided to rewrite the material and present it in two books. Of these, the first one on Electric Circuit Analysis has been designed to serve as a textbook for first/second level course on circuits and the second one on Electric Network Analysis and Synthesis has been envisaged for an advanced level course on network analysis and synthesis.

The latter text is being augmented with additional content that caters to the needs of the advanced user. This text, Electric Circuit Analysis, is the first of the series, while work on the second text with new material included on network functions, electric filters and passive network design, is currently in progress.

Electric Circuit Analysis PDF

Primary Objective: To serve as textbooks that will meet students’ and instructors’ need for a one/ two-semester course on electrical circuits and networks for undergraduate students of electrical and electronics engineering (EE), electronics and communications engineering (EC) and allied streams. This textbook series introduces, explains and reinforces the basic concepts of analysis of dynamic circuits in time-domain and frequency-domain.

Secondary Objective: To use circuit theory as a carrier of the fundamentals of linear system and continuous signal analysis so that the students of EE and EC streams are well-prepared to take up a detailed study of higher level subjects such as analog and digital electronics, pulse electronics, analog and digital communication systems, digital signal processing, control systems, and power electronics at a later stage.

Electric Circuit Analysis PDF

The subject of Electric Circuits and Networks is currently covered in two courses in Indian technical universities. The introductory portion is covered as a part of a course offered in the first year of time is devoted to introductory circuit theory covering the basic principles, DC circuit analysis, circuit theorems and single frequency sinusoidal steady-state analysis using phasor theory. This course is usually a core course for all disciplines.

Therefore, it is limited very much in its content and depth as far as topics in circuit theory are concerned. The course is aimed at giving an overview of electrical engineering to undergraduate students of all engineering disciplines.

Students of disciplines other than EE and EC need to be given a brief exposure to electrical machines, industrial electronics, power systems etc., in the third semester. many universities include this content in the form of a course called ‘Electrical Technology’ in the third semester for students of other engineering disciplines. This approach makes it necessary to teach them AC steady-state analysis of RLC circuits even before they can be told about transient response in such circuits. EE students, however, need AC phasor analysis only from the fourth or fifth semester when they start on Electric machines and Power Systems. But the first year course on basic electrical engineering has to be a common course and hence even EE and EC students learn AC steady-state analysis before transient response.

The second course on circuits is usually taught in the third or fourth semester and is termed ‘Electric Circuit Theory’ for EE students and ‘Circuits and Networks’ or ‘Network Analysis’ for EC students. Few comments on these different course titles and course content are in order. Traditionally, undergraduate circuit theory courses for EE stream slant towards a ‘steady-state’ approach to teaching circuit theory. The syllabi of many universities in India contain extensive coverage on single-phase and three-phase circuits with the transients in RC and RL circuits postponed to the last module in the syllabus.

The course instructor usually finds himself with insufficient contact hours towards the end of the semester to do full justice to this topic. EE stream often orients Circuits courses to serve as prerequisites for courses on electrical machines and power systems.

This led to the EC stream preparing a different syllabus for their second-level circuit theory course––one that was expected to orient the student towards the dynamic behaviour of circuits in timedomain and analysis of dynamic behaviour in the frequency domain. But, in practice, the syllabus for this subject is an attempt to crowd too many topics from Network Analysis and Synthesis into what should have been a basic course on Circuits.

Such a difference in orientation between the EE-stream syllabus for circuit theory and EC-stream syllabus for circuit theory is neither needed nor desirable. The demarcation line between EE and EC has blurred considerably over the last few years. In fact, students of both disciplines need good coverage
of Linear Systems Analysis or Signals and Systems in the third or fourth semester. Unfortunately, Linear Systems Analysis has gone out of the curriculum even in those universities which were wise enough to introduce it earlier, and Signals and Systems has started making its appearance in EC curriculum in many universities. But the EE stream is yet to lose its penchant for AC steady-state in many Indian technical universities.

The subject of electrical circuit theory is as electronic as it is electric. Inductors and capacitors do not get scared and behave differently when they see a transistor. Neither do they reach sinusoidal steady-state without going through a transient state just because they happen to be part of a power system or electrical machine.

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