ENGINEERING-43
Series-Parallel Circuits
Lab-05
Lab Logistics
Experimenter:
Recorder:
Date:
Equipment Used (maker, model, and serial no. if available)
1. Check out a DMM.
2. Go to the side counter, collect resistors, “bread board”, and leads required to construct the circuit shown in Figure 1.
3. Make the DMM-Measurements and Calculations needed to complete Table I and Table II

CAREFULLY Select the DMM range such that meter displays at least FOUR (4) digits.
All DMM measurements should be reported to 4 significant figures.
4. Return all lab hardware to the “as-found” condition
NOTE
The Ammeter MUST be connected in series with NO potential across it; i.e., do NOT connect the ammeter ACROSS Vs or any R.
© Bruce Mayer, PE • Chabot College • 726867811 • Page 1

Figure 1 • Series-Parallel Circuit. V s
= 10.00 Vdc. R1 = 1.7-2.8 k Ω. R2 = 2.9- 4.8kΩ. R3 =
0.6-1.6 k
Ω.
Table I – Component Values as Measured by the DMM

Actual Values
V s
=
R1 =
R2 =
R3 =
© Bruce Mayer, PE • Chabot College • 726867811 • Page 2

Table II – Currents and Potentials
Value Determination V
R1
V
R2
V
R3
I
1
Calculated
DMM Measured

%
Notes

Calculate V & I using the V
S
& R Component-Values from Table I
 
%
V
= 100x(V calc
– V meas
)/V meas
 
%
I
= 100x(I calc
– I meas
)/I meas
Table III – DMM & V/I Resistance Values
Value Determination R
T
R
1
R
2
I
2
I
3
R
3
DMM Measured
Calc by V/I

%
Notes

The DMM Measured values for R, R
2
, and R
3
may be taken from Table I; R
T
must be DMM-
Measured separately.

Calculate the V/I R-values using V & I from Table II
 
% = 100x(R calc
– R meas
)/R meas
Run Notes/Comments
© Bruce Mayer, PE • Chabot College • 726867811 • Page 3