- #1

Vitani11

- 275

- 3

## Homework Statement

A closed loop carries a current of 8.0 A in the counterclockwise direction. The radius of the outer arc is 0.6m and that of the inner arc is 0.40m. What is the magnetic field at P?

## Homework Equations

F = ILxB

F = qV x B

R = outer radius

r = inner radius

## The Attempt at a Solution

[/B]ILxB = mV

^{2}/R

I don't even know how to APPROACH this problem. Please help me. These equations above have too many unknowns to give me an answer and so I need more. I can find L but I can not find m and V in terms on knowns, and even still I think this is a horrible way of solving the problem. I would like to do a sum of forces but ∑F = ILxB + qvxB = ma doesn't exactly help because if I replace a with mv

^{2}/R I still have as many unknowns as before but this time I need q and v.