Current through a circuit with switches

[Physics197]

Homework Statement

http://i.imagehost.org/view/0578/bulbsb
Consider the current flowing through bulb 1. In each situation, does the current through bulb 1 increase, decrease, or stay the same.

1. All switches are closed, then switch 1 is opened.
2. All switches are closed, then switch 2 is opened.
3. Then switch 1 is also opened.
4. Finally, switch 3 is opened as well.

Homework Equations

I = V/R

The Attempt at a Solution

1. Increase - rather than splitting the current between bulbs 1 and 2/3, all of the current can go through 1.
2. stay the same? - this would only increase bulb 6?
3. Increase - similar to 1
4. increase - all the current must go through bulb 1 and 5 now

 

[willem2]

It seems you exchanged S2 and S3. (or questions 2 and 4). The rest is Ok.