Suppose I measured the rise time as a function of the resistance in an RC circuit. The capacitor was nominally 0.2 µF and the signal generator panel says that the equivalent resistance of the device is 50 ?. The results I found are shown in the following table.
R (?):rise time
1000:470 µs
2000:920 µs
3000:1.32 msec
4000:1.82 msec

Plot this data and fit a straight line to the plot. The slope should be proportional to the capacitance and the x-intercept should be the negative of the equivalent resistance of the signal generator. Find these values and compare them to the nominal values. Note that rise time is 2.2?.

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