Recent content by rjackson

  1. R

    Calculating time constant of a circuit?

    That makes sense. So in that case the proper equation is I = Io(e^(-t/T)), correct?
  2. R

    Calculating time constant of a circuit?

    I was thinking that the current I would decrease after the throw and approach 1.5 A, so I used 2.5 as my Io and 1.5 as I or I(t). I used that equation because it's an RL circuit, and it gave me a positive value for the time constant so I believe it's correct. The other option I was considering...
  3. R

    Calculating time constant of a circuit?

    Sorry about that, here's the question: An inductor, two resistors, a make-before-break switch an a battery are connected as shown. The switch throw has been at contact e for a long time and the current in the inductor is 2.5 A. Then, at t = 0, the throw is quickly moved to contact f. During the...
  4. R

    Calculating time constant of a circuit?

    Homework Statement Here's a link to the circuit: http://tinypic.com/view.php?pic=30js0wp&s=6 Initial current, t, and final current are given. Seeking time constant.Homework Equations I=Io (1-e^(-t/T)) where Io is initial current and T is the time constant. This is an RL circuit right?The...