so we did our lab on AC fields and in the lab we adjusted the function generator to frequency of 2.5 Hz and we placed a compass next to opening of coil with 800 turns and we observed that when frequency was increased to 2.5 Hz and when the compas was placed near the coil, the compass needle started to rotate in both rotations very quickly but when it was moved further away the compas moved very slowly in both directions. So my question is that why did the compass rotate so quickly when it was moved closer to the coil? it involves some kind of magnetic force acting on the compass or something but I am confused what is acting on the compass and the coil?