Question

Hello everyone, I understand how the magnetic field vectors are oriented, but can someone help me on number 3. I'm not able to get how to compared the magnitudes. Thank you!

1. At each of the four labeled points (A-D), sketch a vector representing the magnetic field around the bar magnet 2. A second bar magnet identical to the first one is placed to the left of point A. (See figure below At each of the four labeled points (A-D"), sketch a vector representing the net magnetic field, N S- N . 3. Rank the magnitude of the magnetic field at points A, B, A, and B'. If the magnitude of the magnetic field at any point is zero, state that explicitly. Explain your reasoning. If you do not have enough information to determine the ranking, explain what information you would need.) (over)

Answer 1

magnitude of magnetic field vector is maximum at point A' because at this point the field is due to two same bars so field lines are higher at this point and thereafter at point B .after that at A where the field is due to single bar is less compared to point A' and it is same in magnitude at point B because they are equallly separated from relative poles.

So, the order for magnitude is,

A' > B' > A = B