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## Homework Statement

http://img193.imageshack.us/img193/3696/aasdff.th.png [Broken]

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## The Attempt at a Solution

(a) No current, so no time constant since C = 0 for it stores no charge

(b) Current immediately is driven through so [tex]\tau = (R_{1}+R_{2})C[/tex]

(c) I pulled the formula out of the book

[tex]I(t) = \frac{\varepsilon }{R}e^\frac{-t}{\tau}[/tex]

But I am not sure what they want after...

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