How Do You Calculate Resistance and Current in a Carbon Block Using Ohm's Law?

[LeakyFrog]

Homework Statement

A block of carbon is 3cm long and has a square cross section whose sides are .5cm long. A potential difference of 8.4V maintained across its length.
a)What is the resistance of the block?
b)What is the current in this resistor?

Homework Equations

R=pL/A
where p is resistivity

The Attempt at a Solution

I'm fairly certain i can solve this problem right quick if I could understand what exactly the block looked like. The description just doesn't make sense to me. I'm not sure if you can draw pictures on this or not but a picture would be helpful if someone can make one. Thanks.

 

[ben133]

From what I've read the block is a cuboid. Imagine a square that's 0.5cm by 0.5cm, now stretch that back in the third dimension by 3cm, and Bob's your uncle. A similar shape to a packet of gum.

 

[LeakyFrog]

thanks dude (or dudette)! helped a bunch!

 

[ben133]

No worries mate.