Laboratory #10:
AC Measurements
November 15, 2010
Ben Rainey
Objectives:
This experiment introduced the operation and use of the AC wattmeter, and singlephase
series circuits containing resistance, inductance, and capacitance.
There were two main
objectives for this experiment.
Objective one was to prove Kirchhoff’s voltage law (KVL).
Objective two was to observe power consumption in circuit elements.
Equipment:
1.)
AC Voltmeters
2.)
AC ammeter
3.) Wattmeter
4.)
Power decade resistance box
5.)
120 mH inductor
6.)
40 µF capacitor
7.)
Autotransformer power supply
Procedure:
The AC circuit shown in Figure 1 was constructed.
Figure
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The load, Z
L
, was changed as follows:
1.
A resistor of R=25Ω
2.
An inductor of L=120 mH
3.
A capacitor of C=40µF
4. R and L in series
5. R and C in series
6. R, L, and C in series
For each of the loads described above, the following measurements were made:
1.
Wattmeter reading
2.
Total current
3.
Voltage drop across each element
Data
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 Spring '11
 James
 Chemistry, pH, Alternating Current, Electrical resistance, Electrical impedance, Series and parallel circuits

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