- #1

Dustinsfl

- 2,281

- 5

## Homework Statement

Consider the RL circuit shown in the figure. Assume that the current ##i(t)## has reached a steady state with the switch at position ##A##. At time ##t = 0##, the switch is moved from position ##A## to position ##B##.

http://imgur.com/dRIOrp0

If I use the image button, nothing shows. Why is that?

Find the differential equation relating ##i(t)## and ##v_2## for ##t > 0^-##. Specify the initial condition (that is, the value of ##i(0^-)##for this differential equation in terms of ##v_1##).

## The Attempt at a Solution

I have come up with

$$

v_2(t) = Ri + L\frac{di}{dt} = i + \frac{di}{dt}

$$

1. Is this correct?

2. How do I determine the initial condition?