Circuit Theory Lecture Notes: Circuit Theory is a relevant branch of engineering. Students with advanced physics and a strong mathematical base can grasp the topic without much effort.  However, they can perfect their understanding with our Circuit Theory Lecture Notes Pdf, which is created by highly-qualified professors of the concerned department. The Circuit Theory 1, 2  Lecture Notes Pdfare assembled here to enable students to score good grades in their examinations.

Students with weaker concepts on the topic can depend on the Circuit Theory Pdf Notes to excel in the examination. The study material of Network Theory Lecture Notes Pdf here will instill analytical skills engaging students in a deep learning process.  Students should avail themselves the advantages of Electrical Circuit Analysis Handwritten Notes provided here to strengthen their concept and establish a link between theoretical and practical knowledge.

## Introduction to Circuit Theory Notes

Engineering students are introduced to Circuit Theory subject and its analytical part in their second semester. The students will need to learn the circuit theorems application. Electrical and Electronics Engineering students need to study intensively to become an expert in this subject.

In simple words, circuit theory is a normal flow of electric currents through a metal wire.  Usually, the current flows straightforward through the wire. On the other hand, some currents are not associated with electric charges flow.  Such currents, which create magnetic fields and electromagnetic waves through empty space, are called Displacement Current.

According to the Principle of Current Continuity, when electric current and displaced current passes through the closed surface at any time is always zero.

Circuit theory is about a network of elements that need to connect a specific device to an energy source.  Electrical circuits consist of several circuit elements. Some examples of electrical circuits include communications systems, power systems, and computer systems.  Though exact equivalence is nearly impossible to achieve, electrical circuits should represent approximate equivalent circuits with similar intents and behaviour.

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### Circuit Theory Books and Circuit Theory Textbooks for Reference

After extensive research, we have compiled a list of Circuit Theory Books Pdf for the students’ convenience.  Engineering students of top universities and colleges prefer to use the given list of books to prepare for their exam. University Professors teach students from the following Circuit Theory Books.  They prepare the examination paper based on these Circuit Theory Textbooks.

Students stand to benefit from the following Circuit Theory Books.

• Fundamentals of Electric Circuits (McGraw Hill Second Edition 2013) by Charles K. Alexander and Mathew N. O. Sadiku
• Circuit Analysis Theory and Practice (Cengage Learning India 2013) by Allan H. Robbins and Wilhelm C. Miller
• Engineering Circuits Analysis (McGraw Hill Publishers 2013 Edition) by William H. Hayt Jr., Jack E. Kemmerly, and Steven M. Durbin
• Circuits Theory (Analysis and Synthesis) by Chakrabarti A. (Dhanpath Rai and Sons 1999)
• Electric Circuits by Joseph A Edminister and Mahmood Nahri (Schaums Series of McGraw-Hill 2010)
• Circuits and Network Analysis and Synthesis (McGraw Hill 2015) by Sudhakar A and Shyam Mohan SP
• Network Analysis by M. E. Van Valkenburg (Prentice-Hall India Pvt. Ltd. 2015)
• Electric Circuits Analysis (Prentice-Hall of India Pvt Ltd 2015) by Mahadevan and K. Chitra
• Circuit Theory and Networks by Bagchi Surajit
• Introduction to Electric Circuits (The Seventh Edition) by Richard C. Dorf and James A. Svoboda (John Wiley and Sons Inc. 2015)
• Analysis of Electric Circuits by Jegatheesan (McGraw Hill 2015)
• Circuit and Network Theory by Karna Satish K.
• Problems and Solutions in Electric Circuit and Networks (With Essential Theory) by Jaireth
• Electrical Circuit Theory and Technology by John Bird
• Circuit Theory: Continuous and Discrete- Time Systems, Elements of Network Synthesis by Kuriakose
• Theory and Synthesis of Linear Passive Time-Invariant Networks by Dante C. Youla
• Adaptive Filter Theory (Prentice-Hall Information and System Sciences Series) by S. S. Haykin
• AC and DC Network Theory (Physics and Its Applications) by A. J. Pointon and Howarth

### Circuit Theory Syllabus PDF

The students pursuing Electrical and Electronics Engineering (EEE) will be introduced to Circuit Theory in their second semester.  Furthermore, Instrumentation and Control Engineering (ICE) or Electronics and Instrumentation Engineering (EIE) need to pay attention to Circuit Theory Subject.  We have listed the revised syllabus under Regulation 2017, making it a component of the engineering courses.

The latest Circuit Theory Syllabus PDF is a unit-wise breakup of the Circuit Theory Syllabus is as follows-

 Unit Topic Sub-topic I Basic Circuits Analysis Ohm’s Law Resistors in Series and Parallel Circuits Kirchoff’s Laws Mesh Current and Node Voltage Method of Analysis Resistive Elements II Network Reduction and Theorems for DC and AC Circuits Network Reduction -Voltage current division -Source transformation Star Delta Conversion Thevenin’s and Norton Theorems Reciprocity Theorem Superposition Theorem Millman’s Theorem Maximum Power Transfer Theorem III Transient Response Analysis Transient Response of RL, RC, RLC Circuits L and C elements Laplace Transform for DC input and AC sinusoidal input IV Three Phase Circuits Introduction and generation of 3 phase voltage Phase problems Analysis of phase three, wire three, and wire four The expression for total power in a 3 phase balanced circuit The relation between load current and phase current V Resonance and Coupled Circuits Parallel Resonance Cases Series Resonance, frequency, Phasor diagram, representation, reaction curve, Quality factor, Half power frequency, and Bandwidth Series and Parallel Resonance Problems Analysis of Coupled Circuit Problems, Single coupled circuits, Tuned circuit Half power frequencies for parallel resonance circuit, Mutual Inductance, Bandwidth, Coupled Circuit, Coefficient of Coupling, and Quality factor

### List of Circuit Theory Questions Banks

The ultimate aim of learning Circuit Theory is to enable students to analyse electrical circuits, apply theorems, and analyse transients.  Candidates pursuing engineering or diploma courses should be able to solve circuit equations using theorems.  However, they can achieve the course objective only if they study the Circuit Theory Textbooks.  Students can refer to Circuit Theory Books and Circuit Theory Lecture Notes to enhance their knowledge.

The following questions are from the latest Circuit Theory Syllabus.  Once students have learnt the Circuit Theory Lecture Notes, they should test their learning by attempting the following questions.  Practising Circuit Theory Previous Years Question Paper, they will put their exam fears to rest.

1. Describe Ohm’s Law with formula and applications.
2. Summarise Kirchhoff’s Law with formula.
3. What is the equivalent current source when the voltage source of 10V is in series with a 60Ohm resistance?
4. Find the circuit’s equivalent resistance having four resistors of 4 Ohms each connected in parallel with each other.
5. What is the quality factor in an LCR circuit at resonance?
6. Write the expression for resonant angular frequency in parallel resonance.
7. Draw the graph between inductive reactance, inductive capacitance, resistance and impedance in an LCR circuit concerning frequency.
8. In a source free RC circuit, derive the expressions for current and phasor relationship for the capacitor.
9. Derive the expression for mutual inductance between two coaxial loops having n turns. Also, write the coefficient of coupling if their mutual inductances are L1 and L2, respectively.
10. Give examples of materials which do not obey Ohm’s law.
11. Describe the behaviour of an inductor at time equals to infinity.
12. Elaborate on the three-phase balanced circuits.

### FAQs on Circuit Theory Lecture Notes

Question 1.
What is Circuit Theory?

Circuit Theory is a mathematical relationship (involving physics numerical) between voltage, resistance, and current. Electric voltage (v) is the energy supply that passes through the conductor, which moves the electrons in the form of an electrical current from one node to another in a circuit.  Electrical Current (I) is the movement of electric charges from a negative terminal to the positive terminal for energy supply and positive to negative to ease the current flow.  Resistance (R) prevents the electric charge or current flow within a circuit.

Question 2.
Which books can help me improve my grades in the Circuit Theory course?

The students should follow the Circuit Theory Textbooks and refer to Circuit Theory Books to prove their merit in the exam.  Students will continue to excel if they refer to Circuit Theory Lecture Notes and Circuit Theory Questions and Answers.

• Fundamentals of Electric Circuits (McGraw Hill Second Edition 2013) by Charles K. Alexander and Mathew N. O. Sadiku
• Circuit Analysis Theory and Practice (Cengage Learning India 2013) by Allan H. Robbins and Wilhelm C. Miller
• Engineering Circuits Analysis (McGraw Hill Publishers 2013 Edition) by William H. Hayt Jr., Jack E. Kemmerly, and Steven M. Durbin
• Circuits Theory (Analysis and Synthesis) by Chakrabarti A. (Dhanpath Rai and Sons 1999)

Question 3.
How should I prepare for Circuit Theory subjects to do well in the course programme?

Circuit Theory is a branch of Engineering programme. Students need plenty of practice to score good grades in the exam and gain precision on numerical questions.  We have provided excellent study materials.  Here you will also find Diploma Electrical Circuit Theory Notes according to the latest Circuit Theory Syllabus.  Students can aim high with the list of Circuit Theory Textbooks list given here.  Furthermore, if students practice our Circuit Theory Notes Pdf, they can improve their calibre.

Question 4.
Where can I find essential questions for the Circuit Theory course programme?