In the popular writings of Queen Anne's time constant allusion may be found to the early six-o'clock matins.
The time constant of a telephone circuit should therefore not be less than 0.0003 second.
But before that time constant structural modification was in progress.
The advantage of parallel grouping is simply that it reduces the time constant.
Under these circumstances the time constant of the instrument on short circuit is 0.0081 sec.
How does the need for rapid working, and the question of time constant, affect the best mode of grouping the battery cells?
In Fig. 54 the position of the time constant for the top curve is shown by the vertical dotted line at 10 seconds.