What is the magnetic field at a point perpendicular to the center of a square loop with sides length a?

What is the magnetic field at a point perpendicular to the center of a square loop with sides length a and current I?





This would be using an x,y,z graph and the answer would be a formula rather than a discrete number.

What is the magnetic field at a point perpendicular to the center of a square loop with sides length a?
I think this is a trick question, and that the answer should be zero. That's because the magnetic field generated from the current travelling down one side of the square should be cancelled out by the current travelling up the opposite side of the square.



tanning