Here's the question: "What is the magnetic field at the center of the loop in the figure?" OK, the question is really simple and it looks easy. However, when I put in the answer, it's wrong. I tried different methods/formulas but still got the wrong answers. Anyone cares to enlighten me? First, I used the formula B = I(mju_0)N/2R: - I is 5A - mju_0 is 4pi * 10^-7 - N is 1 - R is 0.01 m The wrong answer was 3.14×10-4 T. I then tried modified B = (2*10^-7)I/R (I multiplied this equation w/ some whole numbers to account for the multi directions of the field - which I then realized that it was the wrong way) I still got the wrong answers. I then think, hell, the field might cancel out to zero, which was still wrong. (Obviously, the field was in one direction.) PLEASE HELP. I'm desperate.