Draw a diagram that represents a transverse wave travelling from left to right across the page. On your diagram, label:
the wavelength
the amplitude​

i'm on my way to history not a mistory.

i think it would be 5

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.