Assume that the same amount of current passes through the electromagnets shown. identify which electromagnet is stronger than the electromagnet above. for the pic

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.

none, its a machine

a skateboard rolling across the street - apex