Technical data

31
eries Circuits
ower in a Series Circuit
roject Objective:
• To demonstrate that power distribution in a series circuit is directly related to the distribution of
resistance.
• To verify that the total power equals the sum of all the individual power dissipations.
ems Needed:
- Electronics Trainer - Digital multi-meter
- Jumper Wires - Resistors: 1k, 4.7k & 10k
ake s re power supply is off when connecting meters or changing circuit components.
S
P
P
It
M u
Experiment
Figure 12-1. 1. Connect the initial circuit as shown in
2. Apply 20 volts
A
) to the circuit. Measure each of the individual
d the current, and then calculate the power
_____________________
______________
ted = _________________________
wer dissipated by each resistor is
irect
_________________________.
power rating
c.) composition d.) resistance
ipate the
________ p er.
.
____________________ we
)
3. e ord the su ions.
___
(V
voltage drops an
dissipated by each resistor.
V
1
= _________________________
V
2
= ____
___V
3
= _____ ___
I
T
= _________________________
P
1
calcula
P
2
calculated = _________________________
mA
V
A
1k
R
1
+
4.7k
10k
Figure 12-1
R
2

R
3
P
3
calculated = _________________________
Since the current is the same through all the resistors, the po
d ly related to its
.) b.) physical size a
____________ ow The resistor with the largest value R will diss
a ) most b.) least
The resistor with the smallest value R will dissipate the po r.
a. most b.) least
R c m of all the individual resistor power dissipat
P
1
+ P
2
+ P
3
= ____________________.
Calculate the total power by using the formula: P
T
= V
T
x I
T
P
T
= V
T
x I
T
= __ _______________.