How is the weight of an object related to its mass?

Weight is the measure of the force of gravity on an object's mass, while mass is the measure of how much matter there is in an obj

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.