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Jawaharlal nehru technological university anantapur college of engineering
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PRINCIPLES OF
ELECTRICAL ENGINEERING

Principles of Electrical Engineering
Contents
CONTENTS
Lab.
Dated
No.
List of Experiments
Page
No.
1
Introduction to the measuring methods of
Resistance and Capacitance.
1-8
2
To verify the following two equivalent
forms of Ohm’s Law:
(a) Express I as a function of V and R.
(b) Express V as a function of I and R.
9-13
3
To investigate the characteristics of a series
DC circuit.
14-19
4
To investigate the characteristics of a
parallel DC circuit.
20-24
5
To verify experimentally
Voltage and Current laws.
6
To become familiar with Star/Delta
conversion and calculate power dissipated
in each configuration.
30-35
7
To verify superposition principle in DC
circuits.
36-40
8
To determine by analysis the values VTH
(Thevenin voltage) and RTH (Thevenin
resistance) in a dc circuit containing a single 4 1 - 4 6
voltage source. Also obtain the voltage
across and current passing through RL.
Kirchhoff’s
Remarks
25-29
Revised 2013 IAA

Principles of Electrical Engineering
Contents
9
To verify Norton’s Theorem and the theory
of source transformation.
47-53
10
To note the effect of frequency on basic R,
L and C components.
54-60
11
i. To verify experimentally that the
impedance Z of a series RL circuit is
given by the equation: Z = √( R 2 + X 2 )
ii. To measure the phase angle ‘θ’ between
voltage V and the current I.
iii. To verify experimentally that following
expression hold true for the RL circuit.
61-68
V = VR + jVL…
(vector sum).
V = √ ( VR 2+ VL2).
(Magnitude).
VR = V cos θ. VL = V sin θ.
12
To study the working of a transformer.
69-71
13
To study the Construction of DC Machine
(Parts of DC Machine)
72-76
14
To determine and compare the
characteristics of DC Shunt Generator and
DC separately-excited generator.
77-80
15
To study The Three Phase AC induction
motors and their parts.
81-88
16
To verify double field revolving theory with
the help of single phase induction motor.
89-91
Revised 2013 IAA

Measuring methods for R and C
LAB SESSION 01
OBJECTIVE:
Introduction to the Measuring Methods of Resistance and Capacitance
EQUIPMENTS REQUIRED:
Different Valued Resistors,
Capacitors
VOM (Volt-OhmMilliammeter)
DMM (Digital Multimeter)
THEORY & PROCEDURE:
NOTE:
The purpose of this experiment is to acquaint you with the equipment, so do not
rush. Learn how to read the meter scales accurately, and take your data carefully.
You must become comfortable with the instruments if you expect to perform your
future job function in a professional manner.
“Part 1: Resistance Measurement”
METHOD 1 : Resistance Measurement using VOM/ DMM:
1.
Resistance is never measured by an ohm-meter in a live network, due to the
possibility of damaging the meter with excessively high currents and
obtaining readings that have no meaning.
2.
Always start with the highest range of the instrument and switch down to the
proper range successively.
3.
Use the range in which the deflection falls in the upper half of the meter scale.
4.
Try to ascertain the polarity of dc voltages before making the measurement.
5.
Whenever measuring the resistance of a resistor in a circuit, note whether there
1

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