A current-carrying wire is placed perpendicular to the page. Determine the direction of the electric current from the direction of the magnetic field. Group of answer choices out of the page clockwise to the left counterclockwise into the page

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.