Electrical Technology Notes PDF Free Download

Electrical Technology Notes: Aspirants looking to get hold of the Electrical Technology Notes Pdf and Study Material can access the best notes for their preparation process or to have a revision of essential concepts.

The Basic Electrical Technology Notes for JNTUK, JNTUA, MDU, NPTEL & Politeknik acts as the principal study material and notes that foster and enhance better preparation and helps students score better grades. Students can refer to the Electrical Engineering Technology Lecture Notes as per the latest curriculum from this article.

Electrical Technology Handwritten Notes give aspirants a head start as they will also acquire the latest Syllabus, Reference Books, and Important Questions List for Electrical Engineering Technology Notes Pdf over regular notes.

Participants can benefit from the Electrical Technology Pdf Notes and Reference Books from this article and ace the preparation methods with the best and updated study resources and achieve better grades.

Introduction to Electrical Technology Notes

Electrical innovation is the innovation of creating, putting away, controlling, sending and getting work from electrical energy. (Model applications: power plant generator, spotlight, the electric engine in a can opener, doorbell, electric warmer, hairdryer.)

Voltage and Current


Everybody utilizes this term, despite the fact that they probably won’t get it. You presumably realize that a solitary cell from a spotlight makes an electrical power of 1.5 Volts. You additionally realize that a portable radio battery (with the snaps on the top) makes an electrical power of 9 Volts. (There are six little cells of 1.5 Volts each within the 9 Volt battery.) You realize that family unit electrical sources are 110 or 120 Volts, and you realize that “High Voltage” is perilous.

What else would it be advisable for you to think about voltage? Once more, lets take a gander at the nuclear level.

Each particle has its own supplement of electrons. In a conductor, a portion of those electrons can hop from particle to molecule. In any case, electrons don’t move from molecule to particle without an explanation. At the point when electrons are streaming there is consistently an electrical power pushing them along. We allude to this power as “Voltage”.


Once more, everybody utilizes this term without truly recognizing what it implies. In extremely straightforward terms, the current is the stream pace of the electrons in the circuit. How could that be unique in relation to voltage? We should utilize a water tank and a line for instance.

In certain neighborhoods, you’ll see a water tank raised high over the ground on solid legs. The water in this tank has been raised up there to make pressure in the framework. A progression of lines convey the water down from the tank, underground, into your home, and afterward to each sink, bath, and latrine. The water in your lines is feeling the squeeze on the grounds that the water in the tank is pushing down on it. This weight is like Voltage. Voltage is the weight pushing on the electrons in a circuit.

On the off chance that the entirety of the fixtures in your home is shut, no water moves through the lines. In the event that you open one spigot, some water streams. On the off chance that you open the entirety of the fixtures, a ton of water streams. This progression of water is like an electrical Current. Current is the stream pace of electrons through the circuit.

Electrical Technology Notes and Study Material PDF Free Download

Aspirants pursuing their Bachelors in Technology (B.Tech) or anybody who is interested in learning about the software can avail from the Electrical Technology Notes and Study Material updated in this article. Students can aid your preparation with the ultimate preparation tools that help you score more marks.

Candidates can download the study material and notes and refer to them whenever during the preparation process. Use of the Electrical Technology Notes and Study Materials as a reference will help candidates get a better understanding of the concepts and change their score chart.

Here, is a list of a few important notes for a thorough preparation of the Electrical Technology course program-

  • Electrical Technology Notes PDF
  • Electrical Technology Handwritten Notes PDFs
  • Electrical Technology Notes PDFs
  • Electrical Technology Question Paper PDFs
  • Electrical TechnologyPPT Notes PDF

Electrical Technology Reference Books

Books are a rich source of information and students should refer books that provide excellent conceptual background. Candidates can avail the best books for Electrical Technology as recommended by the experts of the subject.

Pupils can refer and read through the Electrical Technology Books and other Study Sources during your preparation.

The list of best and highly recommended books for Electrical Technology preparation are as follows, and candidates can choose the book that meets their knowledge and prepare accordingly.

  1. “Objective Electrical Technology” by Mehta V K and Mehta Rohit
  2. “Hughes Electrical and Electronic Technology” by Hughes
  3. “A Textbook of Electrical Technology” by B L Theraja and A K Theraja
  4. “An Integrated Course in Electrical Engineering” by J B Gupta
  5. “A Handbook for Electrical Engineering” by ME Team
  6. “Principles of Electrical Engineering and Electronics” by Mehta V K and Mehta Rohit
  7. “Basic Electrical Engineering” by C L Wadhwa
  8. “Basic Electrical and Electronics Engineering” by S K Bhattacharya
  9. “Electrical Technology” by H Cotton
  10. “A Course in Electrical Technology” by J B Gupta

Electrical Technology Curriculum

The best way to make your preparation effective is with an initial idea and an outline of the Electrical Technology Syllabus. Keeping in mind every student’s requirements, we have provided a detailed view of the Electrical Technology curriculum.

Electrical Technology Course Curriculum will give students a clear idea of what to study, and the unit-wise break up gives topics under each unit carefully and allot time to each topic.

Students must cover all the topics before attempting the Electrical Technology exam so that the paper is reasonably comfortable at the time of the exam. Candidates must ensure awareness of the Electrical Technology Syllabus as it prevents you from wasting unnecessary time on redundant topics.

The updated unit-wise breakup of the Electrical Technology Syllabus is as follows-

Unit Topics
UNIT I: Introduction This lesson highlights conventional methods of generating 3-phase, 50 Hz electrical power, its transmission and distribution with the help of transmission lines and substations It will give you a feel of a modern power system with names and function of different major components which comprise it.
UNIT II- D.C. circuits

This module consists of seven lessons starting with the fundamental concepts of electric circuit (active and passive) elements, circuit laws and theorems that established the basic foundation to solve dc network problems or to analyze the voltage, current and power (delivered or absorbed) in different branches.
UNIT III- D.C transient


The study of DC transients is taken up in module-3, consisting of two lessons. The transients in a circuit containing energy storage elements occur when a switch is turned on or off and the behavior of voltage or a current during the transition between two distinct steady state conditions are discussed in the next two lessons.
UNIT IV- Single phase A.C circuits


There are six lessons in this module, where the various aspects related to ac circuits fed from single phase supply.
UNIT V- Three phase circuits There are only three lessons in this module. Only the balanced star-and delta-connected circuits fed from three-phase ac supply
UNIT VI- Magnetic circuits & Core losses In this module there are two important lessons: Simple magnetic circuits and Eddy current and hysteresis losses.
UNIT VII- Transformer


Transformers are one of the most important components of the modern power system. In this module having 6 lessons, various aspects of a transformer are explained and discussed.
UNIT VIII- Three phase induction motor


In this module consisting of six lessons, the various aspects of the three-phase induction motor are presented – concept, construction, principles, equivalent circuit and power flow diagrams etc.
UNIT IX- D.C Machines This module discusses the important construction features, principle of operation of DC machines. The induced voltage in a rotating coil in a stationary magnetic field is always alternating in nature. The functions of commutator segments and brushes, which convert the AC voltage to DC form, are explained.
UNIT X- Measuring instruments


The magnitude of various electric signals can be measured with help of measuring instruments. These instruments are classified according to the quantity measured and the principle of operation.

List of Electrical Technology Important Questions

Candidates studying Electrical Technology Pdf Free Download can go through the list of essential questions mentioned below for the Electrical Technology course programme. All the given review questions aim to help the candidates to excel in the examination.

  1. What is active, reactive, apparent & complex power?
  2. What is a leading & lagging power factor & how can you improve it? State the methods of power factor correction?
  3. Why do we improve the power factor?
  4. What is Electrical Engineering?
  5. Why Transformer Rated In kVA, Not in KW?
  6. What is an Ideal Transformer?
  7. What are transformer losses & their types?
  8. What is transformer efficiency & all-day efficiency? What is the condition for maximum efficiency?
  9. What is the voltage regulation of the transformer & why is it important?
  10. Does current lead or lag the voltage in an inductive or capacitive circuit?

Frequently Asked Questions on Electrical Technology Notes

Question 1.
What is a unilateral & bilateral circuit?

A unilateral is a type of circuit whose properties change with the direction of current flow or the voltage. The properties of a bilateral circuit do not change with changing the current direction or supply voltage.

Question 2.
What is a linear & non-linear circuit?

In a linear circuit, the relation between the current & voltage is linear i.e. directly proportional. The circuit parameter such as frequency, resistance, inductance, capacitance, etc. remains constant with varying current & voltage.

While in the non-linear circuit, the current & voltage does not have a linear relationship. The electrical parameters of such circuits changes with varying voltage & current.

Question 3.
What are the limitations of ohm’s law?

Ohm Law is not applicable to a unilateral circuit or a non-linear circuit. The criterion for ohm’s law is that the resistance must be constant which also depends on the temperature. Whereas, the resistance of a non-linear or unilateral circuit varies with voltage & current. Thus it is not applicable in such a circuit. Also, the temperature must remain constant.

Question 4.
What is the maximum power transfer theorem?

It mentions the condition for maximum power transfer from source to load. It states that n a linear, bilateral network, the maximum power will be transferred from source to the load when the external load resistance equals the internal resistance of the source or Thevenin’s resistance of the circuit.


The information on Electrical Technology Notes Pdf is genuine and reliable and the above mentioned Books and Study Materials aim to help and enhance student’s knowledge and understanding of the subject during preparations and at the time of examination. Students can refer and practice from the provided Electrical Technology Pdf Free Download, Study materials, and Important Questions from this article.