Find the charge density of a ring.

[mateomy]

I have no clue how to start this problem. The professor wrote:

"Write the charge density of a ring."

...and that's it.


I know it would probably be ρ as a function of the radius. But I don't know how to move forward. I was looking through the early section in Griffith's E&M Ch. 3 (That's where we are now) and it's roughly covering Laplace's Equation...so I think I need to start there, but I dunno.

I'm confused because it doensn't ask for a specific point of reference like you would ordinarily get in a general E&M problem.

 

[vela]

I suggest you ask the professor or a classmate for clarification. You're obviously missing some context for that statement.

 

[mateomy]

That's what I'm thinking. I've been anxiously pulling at my eyebrows stressing over this. Thanks for showing me that I'm not totally blind to something.