Along straight wire carries a current of 10.5 a. a second wire is bent into a loop, with a radius of r = 7.5 cm. the wire loop is held at a distance d = 3.0 cm away from the long straight wire. find the magnitude and direction of the currrent in the loop which will produce a net magnetic field of 6.7 x 10-6 t out of the page at the center of the loop.