# Circuits question?

1. Sep 23, 2010

### joedirt

Circuits question!?

A series RC circuit consists of a 550-µF capacitor (initially uncharged) and a 12-kOhm resistor. The combination is connected across a 12-V battery; 3.0 s later, what is

(a) the charge on the capacitor,

(b) the current in the resistor?

I really just wanna know what equations I need to use.. I'm sure I can work it out knowing the right way to do it.

2. Sep 23, 2010

### diazona

Re: Circuits question!?

What equations do you know that concern RC circuits, or circuits in general?

3. Sep 23, 2010

### joedirt

Re: Circuits question!?

I don't know any thats way I'm asking for the equation/s. I know a little about the Kirchhoff's current laws.

4. Sep 23, 2010

### diazona

Re: Circuits question!?

That's fine, you can use Kirchoff's laws to solve the problem. How would you apply Kirchoff's loop rule to this circuit?

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