Give an example where each property of matter has changed. size shape weight and color

e

explanation:

there is no change in the electric potential energy as it is in rest on both conditions.

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.