# Basic question on resistance

1. Jan 25, 2009

### Gregg

1. The problem statement, all variables and given/known data
http://www.ocr.org.uk/Data/publicat...el_Physics_A_2822_Jun_2005_Question_paper.pdf

Question 5

2. Relevant equations

3. The attempt at a solution

For a) I put that because the circuit isn't closed there's no current.

for b) I can see that the total resistance would be the sum of
$168k\Omega + R_2$

$R = \frac{V}{I}$
$R = \frac{3.4}{I}$

I don't know the current. I'm new to this so I don't really know how to solve. I think an example would help.

2. Jan 25, 2009

### nucleus

You have enough information to get current across the resistor.