According to the formula obtained in Problem 30.18, the steady-state value of the current is reached after an infinite time. How can this be reconciled with the fact that in fact the steady-state value of the current is reached after a finite time? What are the limits of applicability of the formula obtained in problem 30.18? 30.18. When you learn how to integrate, try to calculate the mode when closing a circuit with a coil and a resistor to a current source with a constant EMF, i.e. calculate the dependence of current strength on time. Assume that the coil does not have a ferromagnetic core.

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