Dc motors in a hardrive

#12

Joined Nov 30, 2010
18,224
Because you can get more torque out of a given amount of magnetic field by applying the force to the edge of the rotating disk farther away from the center.

How you arrange the rotor and stator is irrelevant from some points of view. That is demonstrated by the myriad ways that motors are designed.

Oops. This is the Homework Forum. I should not have just handed out the answer.
I hope you learned something.
 
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