Question
(a) Use the exact exponential treatment to find how much time is required to bring the current through an 80.0 mH inductor in series with a $15.0 \textrm{ }\Omega$ resistor to 99.0% of its final value, starting from zero. (b) Compare your answer to the approximate treatment using integral numbers of $\tau$. (c) Discuss how significant the difference is.
1. $24.6 \textrm{ ms}$
2. $26.7 \textrm{ ms}$
3. A 9% error is significant since it exceeds the precision of the analytical solution in part (a).
Solution Video