Recent content by LostInToronto

Thank you.

I've already posted this question in the advanced physics forum, but I really think it should go here. My apologies for the double posting. Homework Statement If we are given a uniformly charged solid sphere with total charge Q and radius R, then the volume charge density rho is given by...

I found the answer online. Apparently \sigma=\rho dr'. This doesn't really make sense to me. Can anyone clear up why this is so?

Moved my question to Intro Physics. Mods feel free to delete.

Thank you.

This is a question about determining the direction of the magnetic field so we can use Ampere's law. I'm working out of the 3rd edition of Griffiths' textbook. Ex. 5.8 on page 226 is "Find the magnetic field of an infinite uniform surface current \textbf{K} = K \widehat{x} flowing over the xy...