- #1

snoweangel27

- 17

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**[SOLVED] RC Circuits**

## Homework Statement

1. I have two questions in regards to RC circuits, the first one is how to calculate the maximum voltage across a capacitor, knowing the charge on a battery and the capacitance.

2. The other question involves this circuit

where the potential drop across the capacitor is 12V and the Battery is 36 V. R and C are also known. I need to calculate the current in R immediately after the switch is closed.

## Homework Equations

For the first problem I am sure I am just overlooking something. As far as I know I can't use the equation V = Q/C as that will just give me the Voltage of the battery.

## The Attempt at a Solution

In the second problem, I applied Kirchhoff's Law to obtain -I(1)*R(1)-12V+36V=0, where I then solve for I(1), but my answer in not correct, and I am not sure what I am doing wrong.