To make the magnetic field stronger in an electromagnet, wrap the coil around _.

battery with hi vtge high val resist in series

im guessing the west of station b

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.

conduct current i mean it makes sense