A car traveling south is 200 kilometers from its starting point after 2 hours what is the a

an electric circuit

force tends to be low and long diustance masses are high

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.