Technical data

36
Parallel
Res
Projec
• t the total resistance in a parallel circuit is less than the least
•
Items
- El
- Jumper Wires - Resistors: 18k, 100k
wer applied to the circuit.
Circuits
istance in Parallel Circuits
t Objective:
To verify tha value resistance in
parallel.
To provide practice using parallel resistance formulas and confirming them through circuit
nts. measureme
Needed:
ectronics Trainer - Digital multi-meter
, 220k & 3 - 10k
When making resistance measurements, make sure there is no po
Experiment
1. Connect the circuit as shown in Figure 15-1.
2. Measure R at points A and B.
equal resistors are connected in parallel,
the total resistance is equal to
________________________ the resistance of one branch.
4. After calculating R , use an ohmmeter and measure at points A and B with a second 10k
D.
______.
rted between points E and F. Use the
R
T
calculated = _______________________.
, the total resistance of the circuit is equal
of one branch.
6.
T
R
T
= _______________________.
3. Calculate R
T
if a 10k resistor were to be inserted
between points C and D. Use the product over sum
formula.
R
T
calculated = _______________________.
When two
T
resistor inserted at points C and
R
T
measured = _________________
5. Calculate R
T
if a third 10k resistor were to be inse
reciprocal formula.
When three equal resistors are connected in parallel
to ________________________ the resistance
After calculating
R
T
, use the ohmmeter and measure at points A and B with a third 10k
resistor inserted at points E and F.
R
T
measured = _______________________.
10k
R
1
R
2
R
3
A
B
C
E
D
F
Figure 15-1
1
R
1
1
R
2
1
R
3
1
+
+
=
R
T
R
T
=
R
1
x
R
2
R
1
+
R
2