Hello everyone! I was able to get parts, a-c of this problem, but i'm confused on what stage i'm suppose to use to find T = RC, let t = time.(adsbygoogle = window.adsbygoogle || []).push({});

The problem says: For the cirucit find Vc(t) at t equal to (a) 0-; (b) 0+; (c) infinity; (d) .08s

Answers:

a: 20v

b: 20v

c: 28v

d: 24.4

Note: that is a unit step fucntion, at time = 0, u have no voltage of 10V, at time t > 0 you will have 10V added to the circuit.

so if this is the circuit:

http://img80.imageshack.us/img80/7195/lastscan2zc.jpg [Broken]

I know the equation is going to look like this:

Vc(t) = 20*e^-tT;

so all i need is T = RC;

I need to remove all the power sources and look through the conductor right? but thats the part that confusese me, because the conductor is right in the middle, there is a resistor on both sides, so which side do i "look" from? left or right? Or am i not doing this right at all?

THanks!

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# Homework Help: NOt sure what stage I'm suppose to look at this circuit, finding RC!

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