PASCO EM-8656 AC_DC ELECTRONICS LABORATORY - Manual (Page 24)

20
AC/DC Electronics Laboratory 012-05892A
®
Figure 6.3
R
2
- + + - - +
R
3
R
1
- + + -
-
I
4
+
R
1
=
R
2
=
R
3
=
R
12
=
R
23
=
R
123
=
I
0
=
I
1
=
I
2
=
I
3
=
V
1
=
V
2
=
V
3
=
V
12
=
V
23
=
V
123
=
R
2
R
1
+ -
+
I
1
-
+ -
I
2
- +
I
3
R
3
Figure 6.4
I
0
+
-
R
1
=
R
2
=
R
3
=
R
123
=
I
0
=
I
1
=
I
2
=
I
3
=
I
4
=
V
1
=
V
2
=
V
3
=
V
123
=
➃ Connect the parallel circuit below, using all three resistors. Review the instructions for
connecting the DMM as an ammeter in step 2. Connect it first between the positive terminal of
the battery and the parallel circuit junction to measure I
0
. Then interrupt the various branches
of the parallel circuit and measure the individual branch currents. Record your measurements
in the table below.
Parallel
Discussion
On the basis of your first set of data, what is the pattern for how current behaves in a series
circuit? At this point you should be able to summarize the behavior of all three quantities -
resistance, voltage and current - in series circuits.
On the basis of your second set of data, are there any patterns to the way that currents behave
in a parallel circuit? At this time you should be able to write the general characteristics of
currents, voltages and resistances in parallel circuits.
I
3
I
1
I
2
I
0