Find the velocity vectors of pointscand dat given position when vbis 6. 1 mm/second. The dimensions are given in mm.

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i think the answer is a and b

i wish you luck

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.