Current in a Network of Resistors

[cbb12]

Homework Statement

http://img97.imageshack.us/i/physicsquestion.png/

Homework Equations

R= V/I
For Series: Req= R1+R2
For Parallel: 1/Req= 1/R1+1/R2

The Attempt at a Solution

I have two attempts remaining for each question

 

[berkeman]

Homework Statement

http://img97.imageshack.us/i/physicsquestion.png/

Homework Equations

R= V/I
For Series: Req= R1+R2
For Parallel: 1/Req= 1/R1+1/R2

The Attempt at a Solution

I have two attempts remaining for each question

Show us your calculations so that we can help you.

 

[SammyS]

What's the voltage drop across R₂, the 8Ω resistor?