(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A current pulse is fed to the partial circuit shown in Figure P32.25. The current begins at zero, then becomes Imax = 7.0 A between t = 0 and t = 200 µs, and then is zero once again. Determine the current in the inductor as a function of time. Let L = 1.0 mH and R = 100 . (Use t as appropriate.)

Figure

2. Relevant equations

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3. The attempt at a solution

I know I need to use Kirchhoff's rules for this. I am not quite sure how to go about setting this up...I know I will have:

Emf - IR - L(dI/dt) = 0

Since there is no Emf this becomes:

L(dI/dt) = - IR

I am not sure where to go from here. I have the correct answer for [tex]0\leq[/tex] [tex]t[/tex] [tex]\leq200\mu s[/tex] being:

[tex]I(t) = 7(1 - e^{-100000t}) [/tex]

I also am not sure how to proceed with finding the current for t > 200 microseconds.

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# Homework Help: Partial RL Circuit Help.

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