Q34:An infinite sheet of current lying in the yz plane car- ries a surface current of linear density Js. The current is in the positive z direction, and Js represents the cur- rent per unit length measured along the y axis. Figure P30.34 is an edge view of the sheet. Prove that the mag- netic field near the sheet is parallel to the sheet and perpendicular to the current direction, with magni- tude m0 Js /2.