Question#02 Magnetic Field at the Center of a Wire Loop: A piece of wire is bent to form a circle with radius r. It has a steady current I flowing through it in a counterclockwise direction as seen from the top (looking in the negative z direction). What is B, (0), the z component of B at the center (Le,, r = y = = = 0 ) of the loop? Express your answer in terms of I, r, and constants like up and