PASCO EM-8622 BASIC ELECTRICITY - Manual (Page 25)

21
012-04367E Basic Electricity
EQUIPMENT NEEDED:
-Circuits Experiment Board -Two D-cell Batteries
-Wire Leads -Digital Multimeter (DMM)
-Resistors.
Purpose
The purpose of this lab will be to experimentally demonstrate Kirchhoff’s Rules for electrical
circuits.
Procedure
➀
Connect the circuit shown in Figure 7.1a using any of the resistors you have except the 10
Ω
one. Use Figure 7.1b as a reference along with 7.1a as you record your data. Record the
resistance values in the table below. With no current flowing (the battery disconnected), mea-
sure the total resistance of the circuit between points A and B.
➁
With the circuit connected to the battery and the current
flowing, measure the voltage across each of the resistors and record the values in the table below.
On the circuit diagram in Figure 7.1b, indicate which side of each of the resistors is positive
relative to the other end by placing a “+” at that end.
➂ Now measure the current through each of the resistors. Interrupt the circuit and place the DMM
in series to obtain your reading. Make sure you record each of the individual currents, as well as
the current flow into or out of the main part of the circuit, I
T
.
Experiment 7: Kirchhoff’s Rules
C
D
A B
R
5
R
1
R
2
R
3
R
4
Figure 7.1b
A
R
1
C
R
2
B
R
5
R
3
R
4
D
Wire Wire
Figure 7.1a