Download Electric Circuits EE316

Electric Circuits EE 213
Lab Results Exp.3A
1. St.Name:……………………………………
St.NO: ……………………………………….
2.St.Name: ………………………………….
St.NO: ………………………………………
3.St.Name: ………………………………….
St.NO: ……………………………………….
Sect. No: ………………………………
1
PART ONE:-Series Circuits
Kirchhoff's Voltage Law (KVL) states that the sum of voltages around a closed
path is zero.
Measure Is……………………………………….
Vs/Parameter
Name
Vab
Vbc
Vcd
Vde
Is
Vs=15V
Vs=27V
 Compare the sum of these voltages to Vs?
 Calculate the value of Vab as a percentage of Vs?
Vab/Vs=………………………………………
 Disconnect the power supply from the circuit, and use DMM2 as an
ohmmeter to measure the resistances values; Vs=15 V
Resistance name
R1
R2
R3
Is
Value
 Use the above values and the measured value of Is to calculate
different voltages by Ohm's law, and compare them with the values
obtained previously.
2
Voltage name
Previous value
Calculated values using
Ohm's law
Vbc
Vcd
Vde
 Now, Use voltage division to calculate different voltages, and compare
the result with the measured values.
Voltage name
Vbc
Vcd
Vde
Calculated value
Measured value
Parallel Circuits:
Kirchhoff's Current Law (KCL) states that the sum of all current at any node in
a circuit is zero.

Is=………………………………………………..

Now place DMM2 in series with R1, R2, and R3 to measure the values of the
different currents:
Vs/Parameter
Name
I1
I2
I3
Vs=15V
Vs=27V
3

Compare the sum of the above currents with Is?

Disconnect the power supply, and use DMM1 as an Ohmmeter to measure
the parallel combination of R1, R2, and R3, then measure each resistance
separately, and use the measured values of resistance and Vs to calculate the
different currents, and compare the results with the measured values of these
currents, this is shown in the following table:
Current name Calculated value Measured value
Is
I1
I2
I3

A Consequence of KCL is that the current through one conductance Gk
=1/Rk in a parallel circuit can be calculated using the current division Rule ,
Ik = (Gk /Gt ) It
Gt: the sum of all conductances in parallel, including Gk
It: the current in to the circuit
Calculate I1, I2, and I3 using this rule, and compare the results with the measured
values.
4
Series-Parallel Circuits:
Voltage
Vs
V1
V2
V3
V4
V5
V6
Current
I1
I2
I3
I4
I5
I6
Resistance name
R1
R2
R3
R4
R5
R6
Measured values
DMM value
Measured value
 Now, use the measured values of voltages to verify KVL on all closed
paths, and use the measured values of currents to verify KCL at all
nodes. Finally, use the measured values of resistances with Ohm's law
to calculate voltages using measured currents and vice versa, then
compare all the measured quantities.
5
Conclusion:-
6