Where is the south pole of the bar magnet, based on the magnetic field lines shown?

Hi, in the usual notation, the vectors (or the arrows ) come from the north pole and end in the south pole.

In your image you can see that the arrows emerge on the right side and end in the left side, this means that the south pole on this magnet is on the left side, so the correct answer is B.

r = ρ x length / area  

ρ = r x area / length  

ρ is in ohm-meters  

in basic units, it is m³kg/s³a²  

i think this is it.