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    Voltage across an inductor

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    1. The voltage v across an inductor L, in LR electrical circuit drops exponentially over time t (s). The relationship is:

    See attached.

    Where the emf, E, and τ are constants. Use the table of values for t and v and logarithms to plot an appropriate straight line graphs.

    See attached for table.

    Use your graph to estimate the values of E and τ. How long did it takes to half the initial voltage?

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    Solution Preview

    See the attached file.

    Take logarithm to get,

    lnV = -t/tau + lnE

    This is in the form of y ...

    Solution Summary

    Given the values for time t and voltage v, a graph is plotted to estimate the values of emf and tau, a constant.