Technical data

54
ombination Circuits
ower in a Series-Parallel Circuit
roject Objective:
• To illustrate the power distribution characteristics of a combination circuit by making
measurements and calculations.
• To verify that the electrical parameters of a series-parallel circuit are influenced by the “electrical
location” rather than the physical location of a component.
ems Needed:
- Electronics Trainer - Digital multi-meter
- Jumper Wires - Resistors: 1k, 10k, 18k, 47k
ake sure power supply is off when connecting meters or changing circuit components.
C
P
P
It
M
Experiment
1. Connect the circuit as shown in Figure 24-1.
2. Apply the correct amount of voltage to obtain 1.2mA
rent. Calculate
R and V and
A calc
ted by each compon
_____________________.
P
1
= _________________________.
2
= _________________________.
__________. P
3
= _________________________.
P
4
= _________________________.
wer dissipated in this series-parallel circuit?
____________________
________
o e circuit dissipate more or less power with a
ig
te more or less power with a
mA
of total circuit cur
T A
record your results below.
R
T calc
= ________________________.
V = ________________________.
3. Measure each individual voltage drop and calculate
ssipathe power di ent in the
circuit.
V
A
= _________________________.
V
1
= ____
V
2
= _________________________.
V
3
= _________________________. P
V
4
= _______________
P
T
= _________________________.
What two units are directly proportional to the po
1. ________________________ 2. ____
Is this true with any circuit? ______________
D the components in the parallel portion of th
h her resistor value? ______________________
o the components in the series portion of the circuit dissipaD
igher resistor value? ______________________ h
hich component in the circuit dissipated the most power? ______________________ W
V
A
−
+
R
2
47k
18k
R
3
R
4
R
1
1k
10k
Figure 24-1