PASCO EM-8656 AC_DC ELECTRONICS LABORATORY User Manual
Page 40
36
AC/DC Electronics Laboratory
012-05892A
®
➀
Turn on the switch on the back of the Power Amplifier.
➁
Click the “ON” button in the Signal Generator window.
➂
Click the “MON” button in the Experiment Setup window to begin monitoring data. Observe the
Scope display of Voltage versus Current for the light bulb filament.
➃
Wait a few seconds, then click the “STOP” button.
➄
Click the “OFF” button in the Signal Generator window. Turn off the power switch on the back of
the Power Amplifier.
Questions
➀
Compare the slope of the 10
Ω
resistor as shown in the Scope to the “official” value of resistance.
In other words, how close is the value of slope to the value of resistance?
➁
Why does the slope of the light bulb trace change?
➂
Does the resistor have a constant resistance? Does the light bulb? Why or why not?
➃
The slope of the graph for the light bulb is not symmetric. Why is the slope of the current trace
different when the filament is heating up compared to the trace of current when the filament is
cooling down?
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