2-44. determine the magnitude and orientation,
measured counterclockwise from the positive y axis, of
the resultant force acting on the bracket, if fb = 600 n
and 0 = 20°.
300
fa = 700 n

answer: good job it's all correct !

explanation:

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.