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AC Fundamentals.

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359 min

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English

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Engineering AcademyLearn Without Limits: Free Engineering Courses

Electronics & Instrumentation

Electrical Engineering

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Foundational Learning
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Self-Paced Learning

Why enroll

Participants join this course to build a strong and clear understanding of electrical and AC circuit fundamentals in simple, easy language. It helps them solve numerical problems confidently and understand core concepts like AC circuits, network theorems, and power. The course is highly useful for competitive exams, technical interviews, and practical electrical work.

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Engineering Academy

Engineer

Learn Without Limits: Free Engineering Courses

5+ yrs experience·India

Is this course for you?

You should take this if

You work in Electronics & Instrumentation
You're a Electrical Engineering professional
You want to build skills in Engineering & Design, Project Management
You prefer self-paced learning you can revisit

You should skip if

You need a different specialisation outside Electrical Engineering
You need live interaction with an instructor

Course details

This course is designed to build a strong foundation in electrical and AC circuit fundamentals for students and job-oriented exam aspirants. It starts with basic electrical concepts such as voltage, current, EMF, and electrical networks, helping learners understand how circuits work from the ground up. The course explains AC fundamentals including RMS value, average value, form factor, frequency, and phase in a simple manner. Learners will understand active, reactive, and apparent power and their importance in real electrical systems. Detailed coverage of AC circuits with resistor, inductor, and capacitor explains why current leads or lags voltage. The course includes RL, RC, and RLC circuits, along with resonance concepts. Kirchhoff’s laws (KCL & KVL) and problem-solving techniques are explained step by step. Important network theorems such as Superposition, Thevenin’s, Norton’s, and Maximum Power Transfer are covered with clear conditions and applications. Concepts of ideal and practical voltage and current sources are also included. The course focuses on numerical problems, MCQs, and exam-oriented questions, making it highly useful for competitive exams and practical understanding.

Source: Vizag Tech Hub (Youtube)

Course suitable for

Key topics covered

RMS Value
Average Value
Form Factor

Active Power
Reactive Power
Apparent Power
Resonance

Basic AC concepts
Sinusoidal waveforms
Frequency and phase angle

Electrical network basics
Elements of a network
Types of circuits

Kirchhoff’s Current Law (KCL)
Kirchhoff’s Voltage Law (KVL)

Voltage
Current
EMF
Electrical Network

Star to Delta conversion
Delta to Star conversion
Numerical problems

AC circuit analysis
Impedance concepts
Phase relationships

Ideal voltage source characteristics
Practical voltage source characteristics

Ideal current source characteristics
Practical current source characteristics

Principle of superposition
Application steps
Limitations

Thevenin’s theorem
Norton’s theorem
Conversion between Thevenin and Norton

DC circuit fundamentals
Network theorems
Exam-oriented questions

Concept of maximum power transfer
Condition for maximum power transfer

Voltage–current relationship
Power consumption

Inductive reactance
Current lagging voltage
Reason for phase lag

Capacitive reactance
Current leading voltage
Reason for phase lead

Types of capacitors
Applications
Important MCQs

Single-phase AC fundamentals
Power calculations

RL circuit analysis
RC circuit analysis
RLC circuit behavior
Loop analysis
Numerical problem solving
Introduction to AC
Basic AC parameters

Or turn it into a study plan or PPT outline 📘✨

Course content

The course is readily available, allowing learners to start and complete it at their own pace.

25 lectures5 hr 59 min

ELECTRICAL AC FUNDAMENTALS-1 || RMS VALUE || AVERAGE VALUE || FORM FACTOR ||
14 min
ELECTRICAL AC FUNDAMENTALS-2 || ACTIVE,REACTIVE,APPARENT POWER || RESONANCE ||
11 min
AC circuits fundamentals in English
24 min
ELECTRICAL NETWORKS PART-1
19 min
TSSPDCL || JUNIOR LINEMAN || Basics KVL & KVL ||
12 min
ELECTRICAL || VOLTAGE || CURRENT || EMF|| NETWORK || PART-4
6 min
TSSPDCL || JUNIOR LINEMAN || PROBLEMS ON STAR DELTA CONVERSION ||
11 min
TSSPDCL || JUNIOR LINEMAN || Ac circuits lec - 2 ||
11 min
IDEAL AND PRACTICLE VOLTAGE SOURCES
9 min
IDEAL AND PRACTICLE CURRENT SOURCES
8 min
Superposition theorem
8 min
THEVENIN'S AND NORTON'S THEOREMS IN TELUGU
15 min
Electrical Networks And DC basics important questions
38 min
Know about maximum power transfer theorem and condition for maximum power transfer theorem
11 min
AC THROUGH PURE RESISTOR
8 min
AC THROUGH PURE INDUCTOR & WHY CURRENT LAGS IN INDUCTOR
9 min
AC THROUGH CAPACITOR & HOW CURRENT LEADS VOLTAGE
6 min
VIZAG STEEL JT Electrical || CAPACITORS || Important mcq for competative exams ||
18 min
VIZAG STEEL JT ELECTRICAL || MAXIMUM POWER TRANSFER THEOREM || SIVARAMARAJU ||
14 min
AP Sachivalayam & Vizag steel || digital assistant & junior trainee || Electrical classes lec-01 ||
23 min
vizag steel & digital assistant || single phase Ac circuits || lec-03 ||
20 min
VIZAG STEEL & AP Grama sachivalayam || junior trainee & Digital assistant || AC - circuits-2 ||
17 min
VIZAG STEEL- JT & AP Grama sachivalayam -DA || AC circuits-III RL RC RLC ||
24 min
TSSPDCL || JUNIOR LINEMAN || Important problem on KVL || P SIVARAMARAJU ||
11 min
TSSPDCL || JUNIOR LINEMAN || Ac circuits lec - 1 ||
12 min

Opportunities that await you!

Skills & tools you'll gain

Engineering & Design

Project Management

Research & Developmnet

Career opportunities

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Questions and Answers

Q: You're on-site for pre-commissioning and searching "how to verify AC voltage phase rotation during loop check". The motor VFD trips immediately on enable. With only the P&ID and no motor datasheet, what do you verify first at the MCC before touching parameters?

A: A: Phase rotation is upstream and fast to verify. Wrong rotation can trip a VFD before torque builds. B: You don’t have the datasheet and you’re already faulting before steady voltage matters. C: That’s an MOC without diagnosis. You’ll mask the real issue. D: Earth continuity matters, but it won’t explain a rotation-related immediate trip.

Q: While troubleshooting and googling "why AC current increases when voltage drops", you notice a feeder drawing higher current after a supply sag. Load is unchanged. What’s the dominant explanation?

A: A: Constant power behavior drives current up. Textbook, but still missed in the field. B: Reactance is frequency-driven, not voltage-driven. C: Capacitors don’t change kvar output just because voltage dips this small. D: Skin effect tracks frequency and geometry, not line voltage.

Q: During design review you search "select circuit breaker for AC motor inrush current". The motor is 30 kW, 400 V, DOL start. Which breaker characteristic fits without nuisance trips?

A: A: D-curve tolerates 6–10× inrush. That’s what DOL demands. B: B-curve trips fast. You’ll never get through start. C: Instantaneous at 1.1× FLC is basically guaranteed nuisance. D: Cables aren’t motors. You’ve dropped overload protection.

Q: You’re stuck on-site searching "aluminum vs copper busbar corrosion AC panel humid environment". Coastal plant, indoor MCC, 60% RH. What’s the primary degradation risk to manage?

A: A: Dissimilar metals plus humidity equals galvanic action. B: Oxide layers stabilize; conductivity loss isn’t dominant here. C: SCC needs specific chemistries you don’t have. D: Magnetic fields don’t pit metals.