What is the Mechanical advantage of the inclined plane? A) 0.25 B) 4 C) 90 D) 150

Well, do you have the length and width of the inclined plane? If not, there is no possible way to answer this. If you could add a photo of the question that would be great.

Explanation:

b.

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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.