I thought I understood the right hand rule but I guess not. Here is how I learned it in regards to finding the direction of the magnetic field vector of a current carrying wire. Point your thumb in the direction of the current and curl your fingers around the current-carrying wire. I’m guessing the palm points in the direction of the magnetic field. I have two questions about the following problem:
It seems like charge doesn’t matter in this problem. Why is that?
The right hand rule is used twice to determine the direction of the magnetic field within and outside the loop. This confuses me because the book I have doesn’t explain this well at all. It never mentioned anything about inside and outside expect in this problem. How am I supposed to figure that out?