PASCO EM-8656 AC_DC ELECTRONICS LABORATORY - Manual (Page 25)

21
012-05892A AC/DC Electronics Laboratory
®
EQUIPMENT NEEDED:
– AC/DC Electronics Lab Board: Resistors, Wire Leads
– (2) D-cell Batteries
– Digital Multimeter (DMM)
Purpose
The purpose of this lab will be to experimentally demonstrate Kirchhoff’s Rules for electri-
cal 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
–
+
Battery
A B C
R
1
R
3
Wire
Figure 7.1a
C
D
A B
R
5
R
1
R
2
R
3
R
4
Figure 7.1b
R
2
R
4
Wire
D
R
5