A student drops a ball from a height of 95.0m. If the ball increases speed at a uniform rate of 10.0m/s2, determine all unknowns and answer the following questions.

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.