Find magnitude of magnetic field from loop

[kgal]

Homework Statement

A square loop, with sides of length L, carries current i. Find the magnitude of the magnetic field from the loop at the center of the loop, as a function of i and L.

Homework Equations

B=μ0/4∏∫i * dl X r^ /r^2

The Attempt at a Solution

 

[tiny-tim]

hi kgal!

(try using the X² button just above the Reply box )

1. Homework Statement [/b]
A square loop, with sides of length L, carries current i. Find the magnitude of the magnetic field from the loop at the center of the loop, as a function of i and L.

do it for one side of the square, then multiply by 4