I know I(t) = Io [1 - e-t/t ] is the formula to calculate the current in an RL circuit, however i have no clue what "e" stands for. Can someone give me an insight?
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e is the "en.wikipedia.org/wiki/Exponential_function"[/URL]: here, it means [itex]\mathrm{exp}(-t/\tau)[/itex], where [itex]t[/itex] is time and [itex]\tau[/itex] is a characteristic time constant.