Please note — cover year vs approval: BTEUP's own file for this curriculum prints "YEAR 2025-2026" on its cover, while carrying the approval line "UPDATED AND APPROVED BY BOARD OF TECHNICAL EDUCATION U.P. LUCKNOW IN C.D.C MEETING HELD ON 16.07.2026" on every page. It is filed in BTEUP's 2026-27 folder (folder2627), so it is treated here as the 2026-27 syllabus on the strength of that approval. The scheme it carries is identical, subject for subject and mark for mark, to the 2025-26 scheme.
Electrical Circuits — What This Subject Is About
Every electrical system — from a house wiring to a power grid — is a circuit, and this subject is the grammar of circuits. Electrical Circuits teaches you to maintain electrical systems by applying AC and DC circuit fundamentals: single-phase and three-phase circuits, network analysis and network theorems. It is a practicum subject (L 1 – P 4), so the learning is split between a small theory part and a large lab part.
The five units are single-phase AC series circuits, single-phase AC parallel circuits, three-phase circuits, network reduction and circuit analysis, and network theorems. The first unit carries the most weightage at 23%. There are 17 practicals — from using an oscilloscope on R-L-C circuits to proving Thevenin's, Norton's and maximum power transfer theorems — and 11 reference books.
Subject 3.3 (Practicum) • Total 100 Marks • 3 Credits • L 1 – P 4 • 3rd Semester — Electrical Engineering • Session 2026–27
What You Will Study
Unit – I: Single Phase A.C Series Circuits (03 Periods, 23%)
Sinusoidal quantities: Instantaneous, peak, average and effective values, Form Factor, Peak factor; R, L, C circuit elements its voltage and current response; R-L, R-C, R-L-C combination of A.C series circuit, impedance, reactance, impedance triangle, active power, reactive power, apparent power, power triangle and phasor diagram, Power factor; Resonance, Bandwidth, Quality factor and voltage magnification in series R-L, R-C, R-L-C circuit.
Unit – II: Single Phase A.C Parallel Circuits (03 Periods, 20%)
R-L, R-C and R-L-C parallel combination of A.C. circuits; Impedance, reactance, phasor diagram, impedance triangle, active power, apparent power, reactive power, power triangle and phasor diagram, power factor; Resonance Bandwidth, Quality factor and voltage magnification in parallel R-L, R-C, R-L-C circuit.
Unit – III: Three Phase Circuits (03 Periods, 20%)
Concept of generation of 3-phase alternating voltage, Advantage of 3-phase system over single-phase system, Phasor representation of three phase supply, Phase sequence and polarity; Types of three-phase connections, Relation between phase and line quantities in three phase star and delta system; Balanced and unbalanced load, three phase power, active, reactive and apparent power in star and delta system.
Unit – IV: Network Reduction and Principles of Circuit Analysis (03 Periods, 17%)
Concept of voltage and current sources; symbol and graphical representation, characteristics of practical and ideal sources, Source transformation; Star/delta and delta/star transformation; Mesh Analysis; Nodal Analysis.
Unit – V: Network Theorems (02 Periods, 20%)
Superposition theorem, Thevenin's theorem, Norton's theorem, Maximum power transfer theorem.
Practical Work
- Unit I — Use dual trace oscilloscope to determine A.C voltage and current response in given R, L, C circuit.
- Unit I — Use voltmeter, ammeter, wattmeter to determine active, reactive and apparent power consumed in given R-L series circuit. Draw phasor diagram.
- Unit I — Use voltmeter, ammeter to determine active, reactive and apparent power consumed in given R-C series circuit. Draw phasor diagram.
- Unit I — Use voltmeter, ammeter, wattmeter to determine active, reactive and apparent power consumed in given R-L-C series circuit. Draw phasor diagram.
- Unit I — Use variable frequency supply to create resonance in given series R-L-C circuit or by using variable inductor or variable capacitor.
- Unit II — Use voltmeter, ammeter, wattmeter to determine active, reactive and apparent power consumed in given R-L Parallel circuit. Draw phasor diagram.
And more — the complete list of 17 practicals is inside the PDF.
Complete Syllabus
The full examination scheme, the complete practicals list and the reference books from the official syllabus. The unit-wise topics are in the "What You Will Study" section above.
Examination Scheme
| Code | Paper | Type | L – P | Credits | Internal | External | Total |
|---|---|---|---|---|---|---|---|
| 3.3 | Electrical Circuits | Practicum | 1 – 4 | 3 | 60 | 40 (3 hrs) | 100 |
| Electrical Circuits Total | 3 | 60 | 40 | 100 | |||
Units at a Glance
| Unit | Topic | Periods | Marks Share |
|---|---|---|---|
| I | Single Phase A.C Series Circuits | 03 | 23% |
| II | Single Phase A.C Parallel Circuits | 03 | 20% |
| III | Three Phase Circuits | 03 | 20% |
| IV | Network Reduction and Principles of Circuit Analysis | 03 | 17% |
| V | Network Theorems | 02 | 20% |
Complete Practicals List
This is the complete list of practicals from the official syllabus.
- Unit I — Use dual trace oscilloscope to determine A.C voltage and current response in given R, L, C circuit.
- Unit I — Use voltmeter, ammeter, wattmeter to determine active, reactive and apparent power consumed in given R-L series circuit. Draw phasor diagram.
- Unit I — Use voltmeter, ammeter to determine active, reactive and apparent power consumed in given R-C series circuit. Draw phasor diagram.
- Unit I — Use voltmeter, ammeter, wattmeter to determine active, reactive and apparent power consumed in given R-L-C series circuit. Draw phasor diagram.
- Unit I — Use variable frequency supply to create resonance in given series R-L-C circuit or by using variable inductor or variable capacitor.
- Unit II — Use voltmeter, ammeter, wattmeter to determine active, reactive and apparent power consumed in given R-L Parallel circuit. Draw phasor diagram.
- Unit II — Use voltmeter, ammeter to determine active, reactive and apparent power consumed in given R-C Parallel circuit. Draw phasor diagram.
- Unit II — Use voltmeter, ammeter, wattmeter to determine active, reactive and apparent power consumed in given R-L-C Parallel circuit. Draw phasor diagram.
- Unit II — Use variable frequency supply to create resonance in given series R-L-C Parallel or by using variable inductor or variable capacitor.
- Unit III — Use voltmeter, ammeter, wattmeter, p.f meter to determine line and phase quantities of voltage and current for balanced three phase star connected load and calculate active, reactive, and apparent power. Draw phasor diagram.
- Unit III — Use voltmeter, ammeter, wattmeter, p.f meter to determine line and phase quantities of voltage and current for balanced three phase delta connected load and calculate active, reactive, and apparent power. Draw phasor diagram.
- Unit IV — Use voltmeter, ammeter to determine current through the given branch of an electric network by applying nodal analysis.
- Unit IV — Use voltmeter, ammeter to determine current through the given branch of an electric network by applying mesh analysis.
- Unit V — Use voltmeter, ammeter to determine current through the given branch and voltage across the given element of circuit by applying superposition theorem.
- Unit V — Use voltmeter, ammeter to determine equivalent circuit parameter in a given circuit by applying Thevenin's theorem.
- Unit V — Use voltmeter, ammeter to determine equivalent circuit parameter in a given circuit by applying Norton's theorem.
- Unit V — Use voltmeter, ammeter to determine load resistance for maximum power transfer for a given circuit by applying maximum power transfer theorem.
Reference Books
As listed in the syllabus:
- Ashfaq Husain, Networks & Systems, Khanna Book Publishing, New Delhi
- Gupta, B. R; Singhal, Vandana; Fundamentals of Electrical Network, S. Chand and Co., New Delhi, ISBN: 978-81-219-2318-7
- Saxena, S.B Lal; Dasgupta, K; Fundamentals of Electrical Engineering, Cambridge University Press Pvt. Ltd., New Delhi, ISBN: 978-11-0746-435-3
- Theraja, B. L.: Theraja, A. K, A Text Book of Electrical Technology Vol-I, S. Chand & Co. Ramnagar, New Delhi, ISBN: 9788121924405
- Sudhakar, A.; Shyammohan, S. Palli; Circuit and network, McGraw Hill Education, New Delhi, ISBN: 978-93-3921-960-4
- Bell, David A., Electric Circuits, Oxford University Press New Delhi, ISBN: 978-01-954-25246
- Boylested, R.L., Introductory circuit Analysis, Wheeler, New Delhi, ISBN: 978-00-231-3161-5
- Mittle, V.N.; Mittle, Arvind; Basic Electrical Engineering, McGraw Hill Education, Noida, ISBN: 978-00-705-9357-2
- Sivanandam, S.N, Electric Circuit Analysis, Vikas Publishing House Pvt. Ltd, Noida, ISBN: 978-81259-1364-1
- Salivahanan, S.; Pravinkumar, S; Circuit theory, Vikas Publishing House Pvt. Ltd, Noida; ISBN: 978-93259-7418-0
- Rahul Wadhwa Basic of Electrical Engineering, Asian Publishers, Muzaffarnagar ISBN no. 978-93-5502-068-0
Frequently Asked Questions
How many marks is Electrical Circuits worth in the 3rd semester?
100 marks, 3 credits. It is a practicum subject (L 1 – 4): internal 60, external 40 (3 hrs).
Which unit carries the most weightage in Electrical Circuits?
Single Phase A.C Series Circuits, 23% (03 periods).
How many practicals are there in Electrical Circuits?
17 practicals — the complete list is in the Complete Syllabus section above, and in the PDF.
Which books should I read for Electrical Circuits?
11 reference books are listed in the official syllabus — the full list is in the Complete Syllabus section above.
How can I download the Electrical Circuits syllabus PDF?
The PDF is free to download — use the download link in the Download section below. It is prepared by KAMALDNP Academy from the official BTEUP syllabus.
How many practicals are there in Electrical Circuits?
17 practicals, covering series and parallel R-L-C circuits, three-phase star and delta loads, nodal and mesh analysis, and the superposition, Thevenin, Norton and maximum power transfer theorems.
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- BTEUP Electrical 3rd Semester Syllabus 2026-27
- Electrical Engineering Complete Syllabus 2026-27
- Basics of Power Generation Systems — BTEUP Electrical 3rd Semester Syllabus 2026-27
- Electric Machine-1 — BTEUP Electrical 3rd Semester Syllabus 2026-27
- Electrical and Electronic Measurements — BTEUP Electrical 3rd Semester Syllabus 2026-27
Download the Electrical Circuits Syllabus PDF
Download the complete Electrical Circuits syllabus PDF below — prepared by KAMALDNP Academy, with the full topic list, practicals and reference books.
Download the Electrical Circuits Syllabus PDF
Source: BTEUP 2nd Year Electrical Engineering curriculum (folder2627). The file's cover prints "YEAR 2025-2026", but the approval line "UPDATED AND APPROVED BY BOARD OF TECHNICAL EDUCATION U.P. LUCKNOW IN C.D.C MEETING HELD ON 16.07.2026" appears on every page (95 times), and the file is treated here as the 2026-27 syllabus on the strength of that approval. Topic lists follow the official syllabus; short explanations are the author's own plain-English summaries, not syllabus text. Please confirm with your own polytechnic for any local changes.
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