if a golf ball is hit at an angle of 15 degrees and a velocoty of 50 m/s, how high will the golf ball travel?

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.