Recent content by arrowface

Homework Statement I solved this problem. I just have a general question at the very end. A current flows in a wire that has straight sections on either side of a semicircular loop of radius b. Find the mag and direction of the magnetic field B at point P(center of loop). ......... periods =...

If you have a moment could you please explain why your middle finger(force) points down? Is this because we found which way B points from your previous help(-x), and since current points out of the screen in this problem that would mean force is pointing down?

TSny, thank you for hanging in there with me. I appreciate the explanation as I have had trouble with a few related problems, but this helped clarify the logic behind them. I was hoping you could help me figure out the direction of the force(in the same case) if there was a wire running...

I see(i hope)! Can you please let me know if my visualization is correct: Since the 8th wire has a current pointing into the screen, the magnetic field around the current is clockwise. Therefore as the field hits point the P, the field is going in the negative x direction?

I think I may be missing something trivial. The field is not hard to find since you can simply solve for it using an equation. The direction that it is pointing is the part that is confusing me. I understand how to attain the field, but I do not fully understand why it is pointing in the...

If there was a 7th current pointing in the positive z direction, the B-field at point P would be zero.

I see what you are saying, however I'm confused on how it leads to finding which direction the B field is going in. From your given explanation how would you determine that the B field is going in the negative x direction?

Thank you! I have been stalking for quite some time. I figured it was time to get more involved... The two right hand rules that I am aware of is the three finger one, which I'm trying to apply. Where your thumb is I, pointer is B, and middle finger/palm is Force. The only other right...

Homework Statement Six infinitely long parallel wires, each carrying current +I in z direction, perpendicular to the (x, y) plane. They are spaced at angles 2pi/7 around a circle of radius d. A seventh wire, which would make the arrangement symmetric, is missing. What is the magnitude and...