- #1

parkskier

- 7

- 0

## Homework Statement

V = 115 V, R = 30 , and the switch has been closed for a very long time.

Diagram:

## Homework Equations

Q=CV

V=IR

## The Attempt at a Solution

I thought it would be a good idea to use the Loop Laws I get the following equations (If Loop 1 is the larger loop with the battery, and Loop 2 is the smaller one):

L1: 115-60I1-30I3=0

L2: 30I3-10I2-Q/2.0microF=0

I1=I2+I3

Where I1 is the current through the battery and 60 ohm resistor; I2 is the current through the 10 ohm resistor and capacitor; I3 is the current through the middle resistor.

However, with this there are 3 equations and 4 variables, so something is wrong, or I'm approaching it wrong. Thanks for any help.