Technical data
58
ombination Circuits
etecting a short in a Series-Parallel Circuit
roject Objective:
• To demonstrate the effects of a short occurring in both the series and parallel portions of a
combination circuit.
• To observe what happens to the total circuit current when a short occurs in a series-parallel
circuit.
ems Needed:
- Electronics Trainer - Digital multi-meter
- Jumper Wires - Resistors: 1k, 3 - 10k, 47k
C
D
P
It
Make sure power supply is off when connecting meters or changing circuit compon
ents.
Experiment
1. Connect the circuit as shown in Figure 26-1.
_____________________.
_____________
V = _________________________.
_____________________.
V
4
= _________________________.
V .
3.
. I
3
= __________________________.
.
I
4
= __________________________.
.
I
5
= __________________________.
__________ and ____________________.
, _______________ and _______________
the main line components.
4. m r wire. Measure and record the new voltages.
A
V
3
= _________________________.
1 4
mA
V
A
+
2. Apply the correct amount of voltage to obtain
700 µA of total circuit current. Measure the circuit
voltages and record them below.
V
A
= ____
V = _________ ___.
1
2
V
3
= ____
= _________________________
5
Measure the current through each component.
= __________________________I
T
= __________________________I
1
= __________________________I
2
this circuit, I flows through __________In
T
he voltage drops of _______________T
re the same because they are all in parallel to a
Simulate a short in R
1
by replacing it with a ju pe
V = _________________________.
= (across the short) ______________. V = _________________________. V
−
R
5
1k
Figure 26-1
R
1
R
2
10k
10k
R
3
10k
R
4
47k