V(t) is the voltage as a function of time in volts, a and b are arbitrary constants, τ is the exponential time constant in seconds, and t is the time in seconds. Figure 1 is an example of an ...

A. E. Kennelly, Time Constants for Engineering Purposes in Simple Exponential Transient Phenomena, Proceedings of the National Academy of Sciences of the United States of America, Vol. 10, No. 11 (Nov ...