Consider an infinite uniform sheet in the r-y plane carrying positive current in the positive z direction. 2. let the sheet have current density ? a/m (so a slice of it 1 m wide will carry amperes). choose an amperian path that is a rectangle in the y-: plane (or at z 0), of any width you choose in y, going fror the magnetic field at a distance h from the current sheet. use symmetry arg calculate the circulation on the top and bottom sides of the rectangle, and consider the relationship between the field and the line element on the front and back sides of the rectangle. (hint: b ldi) note that by varying h, you have solved the field everywhere in space for this sheet of current.