Namaskaara Friends,
Welcome to "Gnaana Sindhu" Youtube Channel
The objective behind starting this Youtube Channel is
to assist many Electrical Engineers with Kannada mother tongue
who face lots of challenges in understanding the
Electrical engineering concepts and
and have many technical
doubts in their minds.
Through this platform, I will try to provide
explanations and practical insight into
many electrical concepts using my knowledge
gained through my field experience in this subject,
in both Kannada and English language.
First lecture will cover
What is Engineering, What is Electrical Engineering,
What are the objectives of Electrical Engineering
What are the subjects in Electrical Engineering,
How to study this subject and
how to make learning of electrical engineering fun and interesting
Some people believe that Electrical Engineering is tough
So, lets learn how to make this subject easy
and worth learning
So, First of all,
Lets learn what is Engineering
 
 
What does this word
"Engineering" mean ?
Let us see
The word Engineering can be termed as
a part of Science and technology
So, a special part of
our Knowledge of Science
 
can be visualized as Engineering
 
Everyday, we observe Engineering
for example,
Consider a Fan which gives a cool breeze
Based on the humans necessity,
mankind uses
his knowledge and thoughts
he will try to do small inventions.
He will try to bring changes in the society.
So, you can call it a Technology
Or you can call it as Science
Here, logic is utilized to make such inventions
If a problem is solved using logic
then such solutions are termed as "Engineering".
There is a famous proverb,
What is the difference between
An Engineer and A Scientist
A Scientist who invents something
will try to take name for his
invention, in terms of patent.
Scientist takes up a big problem
and tries to provide a solution
But, an Engineer takes up a
day to day life problem
utilizes his logics and available resources
and provides solutions. But he doesn't
try to take any credits or patents for his small inventions.
In a day to day activity
how an Engineer or a person
uses his brains and logics
utilizes resources in a low cost
in an economic way
 
If a solution to a problem requires
a budget of 100 Crores, the solution
may resolve the problem. But, that solution
is not sensible. Because, whenever a solution is taken up
the management will always look into the
cost incurred to implement such solutions,
what is the profit by incurring such costs,
all these parameters are guaged in Industries. Further, in
future videos, I will explaining about Cost vs Benefit Ratio
How to Quantify Benefits
How much cost is incurred to reap such benefit
We assess that for any
solutions proposed for a problem
An Engineer uses logics
to solve any problem
 
develops solution in
an economic way
 
In Engineering,
Basically
there are three core branches
 
First one is Civil Engineering
The Second is Mechanical Engineering
Third is Electrical Engineering
You might think, why I wrote the branches in order of
Civil, Mechanical and Electrical.
Civil Engineering branch is one of the oldest
branch of Engineering.
When humans transitioned from
Old Stone Age towards
New Stone Age or Metal Age
humans started to
construct houses or with the advent
of wheel, the construction of
Buildings and preparation of land
for the preparation of land,
human has used logics
to prepare such land area
So, that way,
 
Civil Engineering can be said to be started in
Metal Age.
In case of Mechanical Engineering,
we can say that Civil and Mechanical Engineering
started together. We can say, that wheel invention was the inception of Mechanical Engineering
So from the day of
invention of wheel till today, wherever
the movable parts are involved
or wherever any mechanical
equipments are involved
all those inventions
are contributed by Mechanical Engineering branch.
In order to reduce the effort of a human being
in works pertaining to Civil and Mechanical Engineering, when the electrical energy was utlized,
the Electrical Engineering got its inception.
In Electrical Engineering, the
Electricity existed since long back
even before the existence of humans
Because, Lighting is a form of Electricity.
The whole Universe, which is formed by
electron and positron, matter and antimatter concept
From there itself the
electricity was existing
However, the Electrical Engineering
Started when
the work on charges
started. Most of you know,
Coloumb's work, I will
be discussing this in my future lectures.
From the Coloumb's work,
Electrical Engineering works started.
Basically, many of us
would have attained lots of knowledge
on Electrical Engineering since 8th Standard, where
you would have studied the concepts.
Charges, Electric Potential,
Potential Difference, Current, etc
Whatever you would have studied,
would be as part of Physics Subject.
Electrical Engineering is nothing but,
it is an Applied Physics
This Electrical Engineering,
This is an Applied Physics
 
So, in which branch
of Engineering, we use Physics on
on an Application Level, such branch
is an Electrical Engineering Branch.
Here, we learnt about What is Electrical Engineering
 
Electrical Engineering
Everyone says,
Electrical Engineering is the
most toughest branch of Engineering
But, Electrical Engineering
is not actually the most toughest branch
It is actually the most,
the best branch in Engineering
Because, it is
very vast subject
conceptual subject
In fact, it is also called,
a Philosopher's subject
There is not much of a difference between
a Philosopher and an Electrical Engineer.
A philosopher's mind is so
built that his logics are excellent to none
Similar will be an Electrical Engineer, they say.
Electrical Engineering is vast and
conceptual and is mathematics oriented
 
and it is
bleeding edge
So, everyday,
every minute new inventions are made in this branch.
The derived branches
of Electrical Engineering are Electronics and Communications,
Computer Science Engineering
Information Science Engineering
Instrumentation Technology Engineering
So, these are the
sub-branches of the core branch
which is Electrical Engineering.
 
 
So, this toughest branch of Engineering
is not actually tough, but, if this
subject is read in a way by
understanding the concepts, this
subject is very easy.
How to achieve this ?
Which are the subjects in Electrical Engineering ? How to study them, let us learn.
In Electrical Engineering,
First, your basic subject of
Mathematics basics
 
must be very strong.
So, which are these Mathematics basics ?
Whatever mathematics you have studied
till 2nd PUC, and the
mathematics studied during Engineering Course paves
a solid foundation to support Electrical Engineering Subjects.
Before starting studying of any
Electrical Engineering Subjects, you should know a minimum of
Trigonometry
Trigonometry includes Trigonometric functions
and inverse trigonometric functions.
 
Next,
You should know a minimum of
Differentiation
Then
Integration
Then
How to
solve a
Differential Equation
How to create
a Differential Equation, or how to develop
a Differential Equation and how to
solve a differential equation
These are the basics to be understood
well before starting studying
of any Electrical Engineering subject.
Only, when you know these basics,
you can easily step into the Electrical Engineering Course.
These
Electrical Engineering subjects
can be divided into three categories
Electrical Engineering subjects
are categorized into three divisions
Basic Courses
Intermediate Courses
Advance Courses
 
The Basic Courses are usually
learnt during 3rd and 4th Semesters
Intermediate Courses are usually
Advance Courses will be learnt
during 7th and 8th semesters as part of
elective subjects where
you have the freedom to
choose the electives
elective subjects
 
Basic Courses will build
the required foundation in Electrical Engineering
 
It builds a Basic Foundation
As I already told, for this Foundation courses to be understood
Basic Mathematics must be well learnt.
So, after this,
there are certain Engineering Mathematics
concepts to be learnt before Basic Course
These Engineering Mathematics courses,
which includes Advanced Differential Equations Solution techniques,
Probability and Stochastic methods,
 
if learnt well, the basic courses
which pave foundation in Electrical Engineering
will be strong.
Once this foundation is strong,
you can easily comprehend
little advance courses in Electrical Engineering
which will be covered in the Intermediate Courses
 
This will get added over the Foundation
Basic Course.
 
So, once this Foundation Course
and Intermediate Courses are studied
you can choose the subject of your interest
from the list of electives during your
Final Year Engineering which is termed as Advanced Courses.
 
In the Basic Courses,  following subjects are offered:
First one is
Network Analysis
Earlier Network Analysis included
Network Synthesis Also. Now, the network synthesis
is removed from the syllabus
Now, only Network Analysis is being taught
To explain it shortly,
all electrical engineering subjects
requires thorough knowledge of
Network Analysis. This will reduce the
hardships in learning all other subjects.
So, actually, network analysis is
an
approximated analysis. In future, when
we read this subject or in next lectures,
I will let you know. There is a difference between micro level analysis
and a macro level of network analysis.
Detailed or Micro level analysis
is considered in Field Theory subject.
 
Field Theory, is termed the most
difficult subject by many people.
 
Actually Field Theory is not much
difficult, if you have learnt your Basic Maths well.
Basic Mathematics learnt before Engineering and
Engineering Mathematics course, if learnt well,
then, Field Theory just explains concepts based on Fields
And Field Theory will be easy to learn.
 
Field Theory and Network Analysis
Field Theory is a detailed or micro level network analysis
whereas, Network Analysis is a macro level analysis
and deals with many approximations.
 
Approximation of elements parameters and analysing a circuit is called
Network Analysis.
The subject which aids both Network Analysis
and Field Theory
Electrical current or voltage is nothing
but a signal, which can be represented in
the form of a wave.
So, we need to understand about the
behaviour of signals and the system to which it is applied.
Hence, we need to learn about Signals and Systems.
This is the next important Basic Subject.
 
Next comes,
Measurements, now you have a signal,
you need to measure it. You are applying a signal to
a system, but you need to measure the output, the input,
you need to analyse the
measurement in the intermediate circuit, you
need to understand the measuring instruments
and its basics.
 
 
We discussed about Signals and Systems
But, in order to implement them,
we need to understand what is
the logic to implement it.
 
So, we learn about Logic Design subject.
 
Now, we have built a logic to implement it.
 
Now to realise this, what we need
is the equipment's and devices.
Hence, we learn Analog Electronic Circuits
 
 
It is also called
AEC Course
 
Next, we need some energy
say a motive force or
Say we need to have an energy conversion
 
From Mechanical Energy to Electrical Energy
and Electrical Energy to Mechanical Energy
Energy Conversion and Energy Transformation
For this we need to learn about
DC and AC Machines
 
 
Along with Transformers
 
So, we study these things
in our Basic Courses
All these subjects are
basic subjects as you can see
All these subjects are interconnected
Network Analysis gives us knowledge of analysing
a network based on approximations.
That is in a macro level
 
 
If the same network, if analysed in detail
at a microlevel, we need to know Field Theory Concepts.
Now, when we take up a network for study,
we need to input a signal (Say Voltage or Current)
We need to understand concepts of Signals
Now, signals are applied to Systems
Means, any network
can be called as Systems
So we need to learn Signals and Systems.
Now to measure the quantity of Signal, Quality of the Output,
we need to know the measurement devices
and how a measuring instrument works.
Hence we learn the subject Measurements.
In order to implement all these things,
I need to build a device, for which I need to first write a logic.
In order to write that logic, I should have the knowledge of
Logic Design which we learn here.
Now, to build a prototype of this logic,
we need to understand how analog electronic circuits work. Hence
we learn Analog Electronic Circuits.
Now, for the purpose of Energy Conversion
from Mechanical to Electrical, and Electrical to Mechanical
as well as Transformation of Power
from one place to another
in an efficient manner, at
different voltage levels,
we need to understand about Transformers,
and AC & DC machines (The motors and generators).
So, for the purpose of transformation and
conversion, we learn about AC and DC machines subject.
All these subjects are
covered under Basic Engineering Courses.
We then move on to Intermediate Courses.
Then, based on our knowledge level and area of interest,
we choose an advance course work from the list of electives.
This is how we have to start studying
and start visualizing Electrical Engineering Courses.
For now, I am stopping my video here by
explaining Basic Courses. In my next video,
I will take up one of these subjects, let us start from the network analysis,
We will study Network Analysis in detail
Which are the topics of study
dealt in Network Analysis subject. How to study
each and every chapter, What are the problem solving
techniques and how to implement
and How is it different from Field Theory
What are the basic mathematical
requirements to study Network Analysis
What are the basic Engineering Mathematics topics to be studied
How to learn this subject in an easiest way
We will see this during our next classes.
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