Basic Concepts in Electrical Engineeering

1. Chandrashekhar S Patil
Sharad Institute of Technology
Polytechnic
Yadrav
Lecture 1- INTRODUCTION TO
BASIC ELECTRICAL &
ELECTRONICS
ENGINEERING

2. Subject Details
 PROGRAM NAME: MECHANICAL ENGINEERING
AND AUTOMOBILE ENGINEERING PROGRAM
GROUP
 PROGRAM CODE: EE
 COURSE TITLE: BASIC ELECTRICAL AND
ELECTRONICS ENGINEERING
 SEMESTER: THIRD
 COURSE CODE: 22310

3. Industrial requirements
Diploma engineers also called technologists have to
deal with electrical and electronics engineering
principles and applications in industrial processes of
different fields.
Course outcomes:-
1. Use principles of electric and magnetic to solve
engineering problems
2. Determine Voltage and Current in AC circuits.
3. Connect transformers and electric motors for
specific requirements.
4. Identify Electronic components in electric circuits.
5. Use relevant electronic components safely.
6. Use electric/electronic protective devices safely.

4. Contents
1. Introduction to Electrical and Electronics.
2. Brief about Electric and Magnetic circuit(Unit 1).
3. Brief about AC Circuits(Unit 2).
4.Brief about Transformer and Single phase induction
motor(Unit 3).
5.Brief about Electronic components and signals(Unit 4).
6.Brief about Diodes and Applications(Unit 5).
7.Brief about Bipolar Junction Transistor(Unit 6)

5. Introduction to charge
 We know that matter is electrical in nature i.e. it contains
particles of electricity those are protons and electrons.
 The positive charge on a proton is equal to negative charge on
electron.
 Whether a given body exhibits electricity depends upon the
relative number of these particles of electricity.
 If number of electrons is equal to the number of protons then the
body is neutrally charged
 If from a neutral body some electrons are removed there occurs
a deficit of electrons in the body and Consequently the body
attains a positive charge.
 If a neutral body is supplied with electrons there occurs an
excess of electrons. Consequently the body attains a negative
charge.

6. Electric Current:
The directed flow of free electrons(or Charge) is called electric
current. Flow of electric current can be explained with this figure.
The copper strip has a large number of free electrons. When
electric pressure or voltage is applied electrons being negatively
charged
Will start moving towards the positive terminal
around the circuit. This directed flow of electrons is
Called electric current
It is to know that actual direction of current is from
negative terminal to the positive terminal through that
part of the circuit external to the cell. Prior to electron theory it was
assumed that
current flowed from the positive terminal to the negative terminal of
the cell.via the circuit. This convention is so firmly established that it
is still in use.This assumed direction of current is now called as
“Conventional Current”.
Unit of current:-One ampere of current is said to flow through a wire
if at any cross section one coulomb of charge flows in one second.

7. Types of Electric Current:-
 Electric current is classified in to three types:-
Steady Current:- When the magnitude of
current does not
change with time.
Varying current:- When the magnitude of
current changes
with time it is called a varying current.
Alternating current:- An alternating current is
one whose
magnitude changes continuously with time and
direction
changes periodically.

8. Unit 1: Electric and Magnetic Circuits
In the unit we will discuss upon mainly:-
1.1:-EMF, Current, Potential Difference, Power and
Energy,
1.2:-MMF, Magnetic Force, Permeability, Hysteresis
loop,
reluctance, leakage factor and B-H Curve.
1.3:-Analysis between Electric and Magnetic
Circuits.
1.4:-Electromagnetic Induction, Faradays Law of
Electromagnetic induction, Lenz
law,Dynamically
induced EMF.

9. Unit 2:- AC Circuits
In this chapter we will discuss upon.
Cycle Frequency, Periodic Time, Amplitude,
Angular
Velocity, RMS Value, Average Value, Form
Factor,
Peak factor, Impedance, Phase angle and
Power factor,
Mathematical and phasor representation of
alternating
EMF and Current. Voltage and Current
representation
in star and delta connections.

10. Unit 3:-Transformer and 1phase
induction motor.
General Construction of Transformer;
Principle and Different type of Transformers.
EMF Equation and Transformation ratio of
Transformers.
Auto transformer.
Construction and Working of Single phase AC
motor.
Types of AC Motors and there applications.

11. Unit 4:-Electronic Component and
Signals
In this unit we will discuss upon:-
Voltage and Current Sources,
Signal Waveform (Sinusoidal, Triangular and
Square).
Time domain and Frequency domain
representation.
Amplitude, Phase Frequency and Wavelength.
Integrated Circuits:Analog and Digital.

12. Unit 5:- Diodes and Applications
In this unit we will discuss upon:-
PN Junction,
Zener diode
Rectifiers
Filters
Light Emitting Diodes.

13. Unit 6:-Bipolar Junction
Transistor
In this unit we will discuss upon.
Bipolar Junction Transistor
Transistor as Switch and Amplifier
Input and Output Characteristics, CE,CB,CC Mode
Operating Regions
Transistor Parameters.

14. Thank You.