The four wires that lie at the corners of a square of side a= 4.00 cm are carrying equal currents i= 2.30 A into (+) or out of (-) the page, as shown in the picture.
https://d2vlcm61l7u1fs.cloudfront.net/media%2F836%2F836590ca-bff6-4058-997a-d1c4ee72a64d%2FphpzIx0g4.png
Calculate the y component of the magnetic field at the center of the square.
Calculate the x-component of the force on a 1.0-cm long piece of the lower right-hand wire, due to the other three wires.