PASCO EM-8622 BASIC ELECTRICITY - Manual (Page 15)

11
012-04367E Basic Electricity
Purpose
The purpose of this lab is to begin experimenting with the variables that contribute to the opera-
tion of an electrical circuit. This is the first of a three connected labs.
Procedure
➀
Choose the three resistors having the same value. Enter those sets of colors in Table 4.1 below.
We will refer to one as #1, another as #2 and the third as #3.
➁
Determine the coded value of your resistors. Enter the value in the column labeled “Coded
Resistance” in Table 4.1. Enter the Tolerance value as indicated by the color of the fourth band
under “Tolerance.”
➂ Use the Multimeter to measure the resistance of each of your three resistors. Enter these values
in Table 4.1.
➃ Determine the percentage experimental error of each resistance value and enter it in the appropri-
ate column.
Experimental Error = [(|Measured - Coded|) / Coded ] x 100%.
➄
Now connect the three resistors into the SERIES CIRCUIT, figure 4.1, using the spring clips on
the Circuits Experiment Board to hold the leads of the resistors together without bending them.
Measure the resistances of the combinations as indicated on the diagram by connecting the leads
of the Multimeter between the points at the ends of the arrows.
EQUIPMENT NEEDED:
-Circuits Experiment Boar
- Multimeter
-Resistors.
Experiment 4: Resistances in Circuits
#1
#2
#3
Colors
1st 2nd 3rd 4th Resistance
Measured
Resistance
Coded
Error
%
Tolerance
Table 4.1