PASCO Xplorer-GLX Users’ Guide - Manual (Page 140)

134 C a p a c i t o r D i s c h a r g e
3. Make a graph of ln(V
⁄V
0
) versus t.
a) Press to return to the Home Screen; press to open the Graph
display.
b) Press to open the Graphs menu; press to select New Graph
Page.
c) Press twice to highlight the data source menu. Select ln(v/v0) from
the menu
4. Apply a linear fit and find the value of
τ.
a) Press to open the Tools menu; press to select Linear Fit.
b) Press the down arrow key to make the dashed box surround the entire
data set.
c) The slope of the best-fit line equals
τ.
τ = _________________ (include units)
5. (Optional) Repeat the experiment with different resistors. Make a graph
of R versus
τ. What is the relationship between time constant and resis-
tance?
6. (Optional) Repeat the experiment with different capacitors. Make a
graph of C versus
τ. What is the relationship between time constant and
capacitance?
F1
F4 7
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Press to make the dashed
box surround the entire data set
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