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Physics
OpenStudy (anonymous):

magnetic information on hard drives is accessed by a read head that must move rapidly back and forth across a disk. There is a flat coil of fine wire that moves between the poles of a strong magnet. Assume that the coil is 1 cm on a side made of 200 turns of fine wire with a total resistance of 1.5 ohms. The field between the poles of the magnet is .3 T; assume that the field does not extend beyond the edge of the magnet. The coil and the mount that it rides on have a total mass of 12g. If the current is clockwise from above what is the magnitude and direction of the net force on the coil

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