This activity will test the students ability to extract data from two graphs.
They must combine their linearizing skills as well as their understanding of the time constant to extract useful information accurately.
The first graph technique is to determine 1/e of the voltage and read the voltage off at that time (or other technique.
The second method relies on them taking ln of the equation to and using the gradient to determine the time constant.
The last graph relies on them finding the new time constant and fitting a correctly drawn line. the line should have at least 3 calculated points to pass through.
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